Climate Change in Half Moon Bay, California

96+ years of recorded temperature data show Half Moon Bay is warming.

Based on our analysis of 96 years of temperature data near Half Moon Bay, CA, this area shows a warming trend of approximately +0.3°F per decade. 10 of the last 10 years recorded above-average temperatures, and 2014 was the warmest year on record at +3.6°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.3°F

per decade

Warmest Year

2014

+3.6°F anomaly

Recent Warm Years

10 / 10

above-average years

Decade Shift

+2.0°F

2020s vs 1930s

Compared to the National Average

Half Moon Bay is warming 0.1°F/decade faster than the national average.

National: +0.20°F/decade
Half Moon Bay: +0.28°F/decade

Climate Spiral

Each ring represents one year of monthly temperatures. Blue indicates cooler-than-average periods; red indicates warmer. The outward drift over time reveals Half Moon Bay's long-term warming trend.

Temperature anomaly spiral for Half Moon Bay, California
Climate spiral: monthly temperature anomalies from 96+ years of NOAA records for Half Moon Bay, CA.

Warming Stripes

Each vertical stripe represents one year. The color gradient from blue to red shows how annual temperatures have shifted relative to the historical average.

Warming stripes for Half Moon Bay, California
Warming stripes: each stripe is one year of average temperature anomaly for Half Moon Bay, CA.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.28°F per decade quantifies the rate of change.

Temperature trend chart for Half Moon Bay, California
Linear trend: annual temperature anomalies with trend line for Half Moon Bay, CA.

Temperature by Decade

1930s
-0.79°F
1940s
-0.89°F
1950s
-0.52°F
1960s
-0.55°F
1970s
-0.26°F
1980s
+0.38°F
1990s
+0.59°F
2000s
+0.73°F
2010s
+1.57°F
2020s
+1.26°F

Average temperature anomaly per decade relative to the historical baseline period.

Anomaly Scale

-3.1°F Colder Normal +3.4°F Warmer

Color bounds are set to the 5th and 95th percentile of anomalies to avoid outlier washout.

Monthly Temperature Records

Complete monthly temperature record for Half Moon Bay, CA. Filter by decade or download as CSV.

Data Sources & Audit

Station
nClimGrid 5km Grid Point
Distance
0.9 mi
Coverage
99.1%
Records
1,154
Range
1930-01 – 2026-02
Full Data Audit 1,154 records
YearMonthTempBaselineAnomalySourceGap
1930Jan46.7°F48.6°F-1.9°NCLIMGRID
1930Feb52.5°F50.7°F+1.8°NCLIMGRID
1930Mar53.0°F51.9°F+1.0°NCLIMGRID
1930Apr55.0°F53.4°F+1.6°NCLIMGRID
1930May52.8°F56.5°F-3.8°NCLIMGRID
1930Jun58.0°F59.6°F-1.7°NCLIMGRID
1930Jul58.7°F62.2°F-3.4°NCLIMGRID
1930Aug60.8°F63.0°F-2.2°NCLIMGRID
1930Sep59.3°F63.1°F-3.9°NCLIMGRID
1930Oct58.9°F59.3°F-0.4°NCLIMGRID
1930Nov52.9°F53.4°F-0.4°NCLIMGRID
1930Dec47.8°F48.9°F-1.1°NCLIMGRID
1931Jan49.3°F48.6°F+0.8°NCLIMGRID
1931Feb52.4°F50.7°F+1.7°NCLIMGRID
1931Mar53.5°F51.9°F+1.6°NCLIMGRID
1931Apr55.3°F53.4°F+1.9°NCLIMGRID
1931May59.8°F56.5°F+3.3°NCLIMGRID
1931Jun58.6°F59.6°F-1.0°NCLIMGRID
1931Jul63.8°F62.2°F+1.6°NCLIMGRID
1931Aug62.4°F63.0°F-0.6°NCLIMGRID
1931Sep60.9°F63.1°F-2.2°NCLIMGRID
1931Oct56.3°F59.3°F-3.0°NCLIMGRID
1931Nov50.5°F53.4°F-2.8°NCLIMGRID
1931Dec46.9°F48.9°F-2.0°NCLIMGRID
1932Jan46.6°F48.6°F-2.0°NCLIMGRID
1932Feb47.4°F50.7°F-3.2°NCLIMGRID
1932Mar52.8°F51.9°F+0.9°NCLIMGRID
1932Apr51.7°F53.4°F-1.7°NCLIMGRID
1932May55.5°F56.5°F-1.0°NCLIMGRID
1932Jun57.9°F59.6°F-1.7°NCLIMGRID
1932Jul60.1°F62.2°F-2.1°NCLIMGRID
1932Aug61.1°F63.0°F-1.9°NCLIMGRID
1932Sep61.8°F63.1°F-1.4°NCLIMGRID
1932Oct58.4°F59.3°F-0.9°NCLIMGRID
1932Nov56.5°F53.4°F+3.1°NCLIMGRID
1932Dec44.4°F48.9°F-4.5°NCLIMGRID
1933Jan44.5°F48.6°F-4.1°NCLIMGRID
1933Feb46.5°F50.7°F-4.2°NCLIMGRID
1933Mar51.2°F51.9°F-0.8°NCLIMGRID
1933Apr51.8°F53.4°F-1.6°NCLIMGRID
1933May51.8°F56.5°F-4.7°NCLIMGRID
1933Jun55.5°F59.6°F-4.1°NCLIMGRID
1933Jul61.0°F62.2°F-1.2°NCLIMGRID
1933Aug61.2°F63.0°F-1.8°NCLIMGRID
1933Sep59.7°F63.1°F-3.5°NCLIMGRID
1933Oct60.5°F59.3°F+1.2°NCLIMGRID
1933Nov55.7°F53.4°F+2.3°NCLIMGRID
1933Dec48.3°F48.9°F-0.6°NCLIMGRID
1934Jan49.4°F48.6°F+0.8°NCLIMGRID
1934Feb51.9°F50.7°F+1.2°NCLIMGRID
1934Mar56.6°F51.9°F+4.7°NCLIMGRID
1934Apr55.8°F53.4°F+2.3°NCLIMGRID
1934May58.2°F56.5°F+1.6°NCLIMGRID
1934Jun58.6°F59.6°F-1.0°NCLIMGRID
1934Jul61.1°F62.2°F-1.1°NCLIMGRID
1934Aug61.5°F63.0°F-1.5°NCLIMGRID
1934Sep61.5°F63.1°F-1.7°NCLIMGRID
1934Oct58.2°F59.3°F-1.1°NCLIMGRID
1934Nov54.8°F53.4°F+1.5°NCLIMGRID
1934Dec50.2°F48.9°F+1.3°NCLIMGRID
1935Jan47.8°F48.6°F-0.8°NCLIMGRID
1935Feb49.8°F50.7°F-0.9°NCLIMGRID
1935Mar47.4°F51.9°F-4.5°NCLIMGRID
1935Apr53.6°F53.4°F+0.2°NCLIMGRID
1935May55.3°F56.5°F-1.2°NCLIMGRID
1935Jun59.8°F59.6°F+0.2°NCLIMGRID
1935Jul60.4°F62.2°F-1.8°NCLIMGRID
1935Aug61.0°F63.0°F-2.0°NCLIMGRID
1935Sep59.7°F63.1°F-3.4°NCLIMGRID
1935Oct56.6°F59.3°F-2.7°NCLIMGRID
1935Nov50.3°F53.4°F-3.0°NCLIMGRID
1935Dec49.5°F48.9°F+0.6°NCLIMGRID
1936Jan51.1°F48.6°F+2.5°NCLIMGRID
1936Feb49.8°F50.7°F-0.8°NCLIMGRID
1936Mar52.5°F51.9°F+0.5°NCLIMGRID
1936Apr54.4°F53.4°F+1.0°NCLIMGRID
1936May58.6°F56.5°F+2.1°NCLIMGRID
1936Jun59.8°F59.6°F+0.2°NCLIMGRID
1936Jul62.0°F62.2°F-0.2°NCLIMGRID
1936Aug62.0°F63.0°F-1.1°NCLIMGRID
1936Sep62.5°F63.1°F-0.6°NCLIMGRID
1936Oct59.6°F59.3°F+0.2°NCLIMGRID
1936Nov53.2°F53.4°F-0.2°NCLIMGRID
1936Dec48.0°F48.9°F-0.9°NCLIMGRID
1937Jan41.3°F48.6°F-7.3°NCLIMGRID
1937Feb47.1°F50.7°F-3.6°NCLIMGRID
1937Mar51.2°F51.9°F-0.8°NCLIMGRID
1937Apr51.4°F53.4°F-2.0°NCLIMGRID
1937May55.6°F56.5°F-0.9°NCLIMGRID
1937Jun59.8°F59.6°F+0.2°NCLIMGRID
1937Jul61.7°F62.2°F-0.5°NCLIMGRID
1937Aug61.9°F63.0°F-1.1°NCLIMGRID
1937Sep61.4°F63.1°F-1.8°NCLIMGRID
1937Oct60.2°F59.3°F+0.9°NCLIMGRID
1937Nov54.7°F53.4°F+1.3°NCLIMGRID
1937Dec50.8°F48.9°F+1.9°NCLIMGRID
1938Jan48.7°F48.6°F+0.1°NCLIMGRID
1938Feb49.5°F50.7°F-1.2°NCLIMGRID
1938Mar48.8°F51.9°F-3.1°NCLIMGRID
1938Apr51.8°F53.4°F-1.6°NCLIMGRID
1938May55.4°F56.5°F-1.1°NCLIMGRID
1938Jun58.3°F59.6°F-1.4°NCLIMGRID
1938Jul61.3°F62.2°F-0.8°NCLIMGRID
1938Aug61.7°F63.0°F-1.3°NCLIMGRID
1938Sep61.5°F63.1°F-1.6°NCLIMGRID
1938Oct58.0°F59.3°F-1.3°NCLIMGRID
1938Nov51.9°F53.4°F-1.5°NCLIMGRID
1938Dec50.6°F48.9°F+1.7°NCLIMGRID
1939Jan48.3°F48.6°F-0.2°NCLIMGRID
1939Feb47.2°F50.7°F-3.5°NCLIMGRID
1939Mar49.9°F51.9°F-2.1°NCLIMGRID
1939Apr54.4°F53.4°F+1.0°NCLIMGRID
1939May56.5°F56.5°F-0.1°NCLIMGRID
1939Jun58.5°F59.6°F-1.2°NCLIMGRID
1939Jul61.3°F62.2°F-0.9°NCLIMGRID
1939Aug61.4°F63.0°F-1.6°NCLIMGRID
1939Sep64.9°F63.1°F+1.7°NCLIMGRID
1939Oct59.0°F59.3°F-0.3°NCLIMGRID
1939Nov53.6°F53.4°F+0.2°NCLIMGRID
1939Dec51.5°F48.9°F+2.7°NCLIMGRID
1940Jan50.5°F48.6°F+1.9°NCLIMGRID
1940Feb52.0°F50.7°F+1.3°NCLIMGRID
1940Mar53.5°F51.9°F+1.6°NCLIMGRID
1940Apr55.0°F53.4°F+1.6°NCLIMGRID
1940May56.8°F56.5°F+0.2°NCLIMGRID
1940Jun59.8°F59.6°F+0.2°NCLIMGRID
1940Jul62.0°F62.2°F-0.2°NCLIMGRID
1940Aug61.9°F63.0°F-1.2°NCLIMGRID
1940Sep63.6°F63.1°F+0.4°NCLIMGRID
1940Oct58.8°F59.3°F-0.5°NCLIMGRID
1940Nov52.4°F53.4°F-1.0°NCLIMGRID
1940Dec51.4°F48.9°F+2.5°NCLIMGRID
1941Jan50.1°F48.6°F+1.5°NCLIMGRID
1941Feb51.7°F50.7°F+1.0°NCLIMGRID
1941Mar54.6°F51.9°F+2.7°NCLIMGRID
1941Apr52.8°F53.4°F-0.6°NCLIMGRID
1941May59.1°F56.5°F+2.6°NCLIMGRID
1941Jun59.3°F59.6°F-0.4°NCLIMGRID
1941Jul62.3°F62.2°F+0.1°NCLIMGRID
1941Aug61.3°F63.0°F-1.7°NCLIMGRID
1941Sep62.1°F63.1°F-1.1°NCLIMGRID
1941Oct56.8°F59.3°F-2.5°NCLIMGRID
1941Nov54.5°F53.4°F+1.1°NCLIMGRID
1941Dec49.8°F48.9°F+0.9°NCLIMGRID
1942Jan48.2°F48.6°F-0.4°NCLIMGRID
1942Feb48.6°F50.7°F-2.1°NCLIMGRID
1942Mar50.2°F51.9°F-1.8°NCLIMGRID
1942Apr52.4°F53.4°F-1.0°NCLIMGRID
1942May55.2°F56.5°F-1.3°NCLIMGRID
1942Jun58.4°F59.6°F-1.3°NCLIMGRID
1942Jul62.2°F62.2°F+0.1°NCLIMGRID
1942Aug61.2°F63.0°F-1.8°NCLIMGRID
1942Sep60.6°F63.1°F-2.5°NCLIMGRID
1942Oct57.8°F59.3°F-1.5°NCLIMGRID
1942Nov52.0°F53.4°F-1.4°NCLIMGRID
1942Dec48.6°F48.9°F-0.3°NCLIMGRID
1943Jan47.7°F48.6°F-0.8°NCLIMGRID
1943Feb51.0°F50.7°F+0.3°NCLIMGRID
1943Mar52.6°F51.9°F+0.7°NCLIMGRID
1943Apr53.9°F53.4°F+0.4°NCLIMGRID
1943May57.1°F56.5°F+0.5°NCLIMGRID
1943Jun57.7°F59.6°F-2.0°NCLIMGRID
1943Jul61.3°F62.2°F-0.9°NCLIMGRID
1943Aug61.2°F63.0°F-1.9°NCLIMGRID
1943Sep63.6°F63.1°F+0.5°NCLIMGRID
1943Oct58.5°F59.3°F-0.8°NCLIMGRID
1943Nov54.5°F53.4°F+1.2°NCLIMGRID
1943Dec49.6°F48.9°F+0.7°NCLIMGRID
1944Jan48.5°F48.6°F-0.1°NCLIMGRID
1944Feb47.4°F50.7°F-3.3°NCLIMGRID
1944Mar51.4°F51.9°F-0.5°NCLIMGRID
1944Apr50.9°F53.4°F-2.5°NCLIMGRID
1944May55.9°F56.5°F-0.7°NCLIMGRID
1944Jun58.1°F59.6°F-1.5°NCLIMGRID
1944Jul60.3°F62.2°F-1.9°NCLIMGRID
1944Aug60.9°F63.0°F-2.1°NCLIMGRID
1944Sep60.8°F63.1°F-2.3°NCLIMGRID
1944Oct59.0°F59.3°F-0.3°NCLIMGRID
1944Nov51.5°F53.4°F-1.9°NCLIMGRID
1944Dec50.5°F48.9°F+1.6°NCLIMGRID
1945Jan46.4°F48.6°F-2.2°NCLIMGRID
1945Feb49.2°F50.7°F-1.5°NCLIMGRID
1945Mar48.1°F51.9°F-3.9°NCLIMGRID
1945Apr52.2°F53.4°F-1.2°NCLIMGRID
1945May54.4°F56.5°F-2.1°NCLIMGRID
1945Jun60.2°F59.6°F+0.6°NCLIMGRID
1945Jul62.5°F62.2°F+0.3°NCLIMGRID
1945Aug60.0°F63.0°F-3.0°NCLIMGRID
1945Sep62.2°F63.1°F-1.0°NCLIMGRID
1945Oct59.1°F59.3°F-0.2°NCLIMGRID
1945Nov52.4°F53.4°F-1.0°NCLIMGRID
1945Dec49.9°F48.9°F+1.0°NCLIMGRID
1946Jan47.4°F48.6°F-1.2°NCLIMGRID
1946Feb46.6°F50.7°F-4.1°NCLIMGRID
1946Mar49.6°F51.9°F-2.3°NCLIMGRID
1946Apr52.6°F53.4°F-0.8°NCLIMGRID
1946May55.3°F56.5°F-1.2°NCLIMGRID
1946Jun58.5°F59.6°F-1.1°NCLIMGRID
1946Jul62.1°F62.2°F-0.1°NCLIMGRID
1946Aug60.6°F63.0°F-2.4°NCLIMGRID
1946Sep62.3°F63.1°F-0.8°NCLIMGRID
1946Oct56.9°F59.3°F-2.4°NCLIMGRID
1946Nov50.3°F53.4°F-3.1°NCLIMGRID
1946Dec48.6°F48.9°F-0.3°NCLIMGRID
1947Jan44.1°F48.6°F-4.5°NCLIMGRID
1947Feb50.3°F50.7°F-0.3°NCLIMGRID
1947Mar53.1°F51.9°F+1.1°NCLIMGRID
1947Apr55.7°F53.4°F+2.3°NCLIMGRID
1947May57.7°F56.5°F+1.1°NCLIMGRID
1947Jun61.0°F59.6°F+1.3°NCLIMGRID
1947Jul61.7°F62.2°F-0.5°NCLIMGRID
1947Aug63.2°F63.0°F+0.2°NCLIMGRID
1947Sep62.2°F63.1°F-1.0°NCLIMGRID
1947Oct59.3°F59.3°F+0.0°NCLIMGRID
1947Nov49.9°F53.4°F-3.5°NCLIMGRID
1947Dec47.5°F48.9°F-1.4°NCLIMGRID
1948Jan50.3°F48.6°F+1.7°NCLIMGRID
1948Feb47.0°F50.7°F-3.7°NCLIMGRID
1948Mar48.6°F51.9°F-3.4°NCLIMGRID
1948Apr51.8°F53.4°F-1.6°NCLIMGRID
1948May53.8°F56.5°F-2.7°NCLIMGRID
1948Jun59.2°F59.6°F-0.5°NCLIMGRID
1948Jul61.0°F62.2°F-1.1°NCLIMGRID
1948Aug61.8°F63.0°F-1.2°NCLIMGRID
1948Sep59.9°F63.1°F-3.3°NCLIMGRID
1948Oct58.6°F59.3°F-0.7°NCLIMGRID
1948Nov51.9°F53.4°F-1.5°NCLIMGRID
1948Dec44.7°F48.9°F-4.2°NCLIMGRID
1949Jan40.8°F48.6°F-7.8°NCLIMGRID
1949Feb45.1°F50.7°F-5.6°NCLIMGRID
1949Mar50.9°F51.9°F-1.1°NCLIMGRID
1949Apr53.5°F53.4°F+0.0°NCLIMGRID
1949May56.2°F56.5°F-0.3°NCLIMGRID
1949Jun59.5°F59.6°F-0.1°NCLIMGRID
1949Jul59.8°F62.2°F-2.4°NCLIMGRID
1949Aug61.3°F63.0°F-1.7°NCLIMGRID
1949Sep62.4°F63.1°F-0.7°NCLIMGRID
1949Oct55.9°F59.3°F-3.5°NCLIMGRID
1949Nov55.6°F53.4°F+2.2°NCLIMGRID
1949Dec46.8°F48.9°F-2.1°NCLIMGRID
1950Jan44.8°F48.6°F-3.8°NCLIMGRID
1950Feb48.6°F50.7°F-2.0°NCLIMGRID
1950Mar50.2°F51.9°F-1.7°NCLIMGRID
1950Apr53.5°F53.4°F+0.1°NCLIMGRID
1950May55.1°F56.5°F-1.5°NCLIMGRID
1950Jun57.5°F59.6°F-2.1°NCLIMGRID
1950Jul60.9°F62.2°F-1.3°NCLIMGRID
1950Aug62.5°F63.0°F-0.5°NCLIMGRID
1950Sep63.0°F63.1°F-0.1°NCLIMGRID
1950Oct59.0°F59.3°F-0.3°NCLIMGRID
1950Nov58.0°F53.4°F+4.7°NCLIMGRID
1950Dec52.1°F48.9°F+3.2°NCLIMGRID
1951Jan48.2°F48.6°F-0.4°NCLIMGRID
1951Feb49.3°F50.7°F-1.3°NCLIMGRID
1951Mar50.4°F51.9°F-1.6°NCLIMGRID
1951Apr51.2°F53.4°F-2.2°NCLIMGRID
1951May56.7°F56.5°F+0.1°NCLIMGRID
1951Jun57.4°F59.6°F-2.2°NCLIMGRID
1951Jul59.4°F62.2°F-2.8°NCLIMGRID
1951Aug60.5°F63.0°F-2.5°NCLIMGRID
1951Sep62.1°F63.1°F-1.1°NCLIMGRID
1951Oct58.9°F59.3°F-0.5°NCLIMGRID
1951Nov53.5°F53.4°F+0.1°NCLIMGRID
1951Dec47.8°F48.9°F-1.1°NCLIMGRID
1952Jan45.8°F48.6°F-2.8°NCLIMGRID
1952Feb49.6°F50.7°F-1.0°NCLIMGRID
1952Mar49.2°F51.9°F-2.7°NCLIMGRID
1952Apr53.4°F53.4°F+0.0°NCLIMGRID
1952May56.3°F56.5°F-0.3°NCLIMGRID
1952Jun56.5°F59.6°F-3.1°NCLIMGRID
1952Jul62.3°F62.2°F+0.1°NCLIMGRID
1952Aug60.6°F63.0°F-2.4°NCLIMGRID
1952Sep62.4°F63.1°F-0.7°NCLIMGRID
1952Oct58.2°F59.3°F-1.1°NCLIMGRID
1952Nov51.6°F53.4°F-1.8°NCLIMGRID
1952Dec50.5°F48.9°F+1.6°NCLIMGRID
1953Jan53.0°F48.6°F+4.4°NCLIMGRID
1953Feb50.0°F50.7°F-0.7°NCLIMGRID
1953Mar49.8°F51.9°F-2.1°NCLIMGRID
1953Apr51.2°F53.4°F-2.3°NCLIMGRID
1953May54.2°F56.5°F-2.3°NCLIMGRID
1953Jun57.8°F59.6°F-1.9°NCLIMGRID
1953Jul60.4°F62.2°F-1.8°NCLIMGRID
1953Aug61.4°F63.0°F-1.6°NCLIMGRID
1953Sep64.1°F63.1°F+1.0°NCLIMGRID
1953Oct58.3°F59.3°F-1.0°NCLIMGRID
1953Nov53.6°F53.4°F+0.2°NCLIMGRID
1953Dec50.1°F48.9°F+1.2°NCLIMGRID
1954Jan47.8°F48.6°F-0.7°NCLIMGRID
1954Feb51.1°F50.7°F+0.4°NCLIMGRID
1954Mar48.6°F51.9°F-3.4°NCLIMGRID
1954Apr54.5°F53.4°F+1.1°NCLIMGRID
1954May55.9°F56.5°F-0.6°NCLIMGRID
1954Jun58.4°F59.6°F-1.3°NCLIMGRID
1954Jul61.6°F62.2°F-0.6°NCLIMGRID
1954Aug60.0°F63.0°F-3.0°NCLIMGRID
1954Sep61.6°F63.1°F-1.5°NCLIMGRID
1954Oct58.2°F59.3°F-1.1°NCLIMGRID
1954Nov53.8°F53.4°F+0.4°NCLIMGRID
1954Dec48.4°F48.9°F-0.5°NCLIMGRID
1955Jan45.2°F48.6°F-3.4°NCLIMGRID
1955Feb47.9°F50.7°F-2.8°NCLIMGRID
1955Mar51.0°F51.9°F-1.0°NCLIMGRID
1955Apr49.5°F53.4°F-3.9°NCLIMGRID
1955May55.5°F56.5°F-1.1°NCLIMGRID
1955Jun57.7°F59.6°F-1.9°NCLIMGRID
1955Jul58.9°F62.2°F-3.3°NCLIMGRID
1955Aug59.0°F63.0°F-4.0°NCLIMGRID
1955Sep59.6°F63.1°F-3.5°NCLIMGRID
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1984Mar54.5°F51.9°F+2.6°NCLIMGRID
1984Apr52.7°F53.4°F-0.7°NCLIMGRID
1984May58.2°F56.5°F+1.7°NCLIMGRID
1984Jun59.0°F59.6°F-0.6°NCLIMGRID
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1985Jan47.0°F48.6°F-1.6°NCLIMGRID
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1985Mar49.6°F51.9°F-2.3°NCLIMGRID
1985Apr55.8°F53.4°F+2.4°NCLIMGRID
1985May56.1°F56.5°F-0.4°NCLIMGRID
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1986Jan52.6°F48.6°F+4.1°NCLIMGRID
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1986Apr53.6°F53.4°F+0.2°NCLIMGRID
1986May56.4°F56.5°F-0.1°NCLIMGRID
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1986Aug62.4°F63.0°F-0.6°NCLIMGRID
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1986Oct59.5°F59.3°F+0.2°NCLIMGRID
1986Nov54.4°F53.4°F+1.0°NCLIMGRID
1986Dec49.3°F48.9°F+0.4°NCLIMGRID
1987Jan47.7°F48.6°F-0.9°NCLIMGRID
1987Feb51.6°F50.7°F+0.9°NCLIMGRID
1987Mar52.4°F51.9°F+0.5°NCLIMGRID
1987Apr56.8°F53.4°F+3.4°NCLIMGRID
1987May58.7°F56.5°F+2.2°NCLIMGRID
1987Jun59.9°F59.6°F+0.3°NCLIMGRID
1987Jul60.8°F62.2°F-1.4°NCLIMGRID
1987Aug63.5°F63.0°F+0.5°NCLIMGRID
1987Sep62.6°F63.1°F-0.5°NCLIMGRID
1987Oct61.8°F59.3°F+2.5°NCLIMGRID
1987Nov54.3°F53.4°F+0.9°NCLIMGRID
1987Dec48.7°F48.9°F-0.2°NCLIMGRID
1988Jan49.3°F48.6°F+0.8°NCLIMGRID
1988Feb52.2°F50.7°F+1.5°NCLIMGRID
1988Mar53.0°F51.9°F+1.1°NCLIMGRID
1988Apr55.1°F53.4°F+1.7°NCLIMGRID
1988May56.3°F56.5°F-0.3°NCLIMGRID
1988Jun59.8°F59.6°F+0.2°NCLIMGRID
1988Jul64.4°F62.2°F+2.2°NCLIMGRID
1988Aug63.5°F63.0°F+0.5°NCLIMGRID
1988Sep61.4°F63.1°F-1.7°NCLIMGRID
1988Oct59.4°F59.3°F+0.1°NCLIMGRID
1988Nov53.4°F53.4°F+0.0°NCLIMGRID
1988Dec48.4°F48.9°F-0.5°NCLIMGRID
1989Jan46.7°F48.6°F-1.9°NCLIMGRID
1989Feb46.0°F50.7°F-4.7°NCLIMGRID
1989Mar52.8°F51.9°F+0.9°NCLIMGRID
1989Apr57.4°F53.4°F+4.0°NCLIMGRID
1989May56.9°F56.5°F+0.4°NCLIMGRID
1989Jun60.5°F59.6°F+0.8°NCLIMGRID
1989Jul61.8°F62.2°F-0.4°NCLIMGRID
1989Aug63.2°F63.0°F+0.1°NCLIMGRID
1989Sep61.5°F63.1°F-1.6°NCLIMGRID
1989Oct59.0°F59.3°F-0.3°NCLIMGRID
1989Nov55.1°F53.4°F+1.7°NCLIMGRID
1989Dec49.9°F48.9°F+1.0°NCLIMGRID
1990Jan48.8°F48.6°F+0.2°NCLIMGRID
1990Feb47.1°F50.7°F-3.5°NCLIMGRID
1990Mar51.7°F51.9°F-0.2°NCLIMGRID
1990Apr56.0°F53.4°F+2.6°NCLIMGRID
1990May56.8°F56.5°F+0.3°NCLIMGRID
1990Jun60.2°F59.6°F+0.5°NCLIMGRID
1990Jul63.5°F62.2°F+1.3°NCLIMGRID
1990Aug65.4°F63.0°F+2.4°NCLIMGRID
1990Sep64.3°F63.1°F+1.2°NCLIMGRID
1990Oct59.6°F59.3°F+0.3°NCLIMGRID
1990Nov52.8°F53.4°F-0.6°NCLIMGRID
1990Dec44.5°F48.9°F-4.4°NCLIMGRID
1991Jan48.0°F48.6°F-0.6°NCLIMGRID
1991Feb51.9°F50.7°F+1.2°NCLIMGRID
1991Mar49.5°F51.9°F-2.4°NCLIMGRID
1991Apr52.2°F53.4°F-1.2°NCLIMGRID
1991May54.0°F56.5°F-2.5°NCLIMGRID
1991Jun56.9°F59.6°F-2.7°NCLIMGRID
1991Jul62.6°F62.2°F+0.4°NCLIMGRID
1991Aug63.1°F63.0°F+0.1°NCLIMGRID
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1991Nov54.2°F53.4°F+0.8°NCLIMGRID
1991Dec49.3°F48.9°F+0.4°NCLIMGRID
1992Jan48.2°F48.6°F-0.4°NCLIMGRID
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1992Mar55.0°F51.9°F+3.1°NCLIMGRID
1992Apr57.9°F53.4°F+4.5°NCLIMGRID
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1992Jun61.3°F59.6°F+1.7°NCLIMGRID
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1992Nov54.2°F53.4°F+0.8°NCLIMGRID
1992Dec48.1°F48.9°F-0.8°NCLIMGRID
1993Jan47.8°F48.6°F-0.7°NCLIMGRID
1993Feb50.2°F50.7°F-0.5°NCLIMGRID
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1993Nov53.6°F53.4°F+0.3°NCLIMGRID
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1994Jan50.2°F48.6°F+1.6°NCLIMGRID
1994Feb48.9°F50.7°F-1.7°NCLIMGRID
1994Mar53.7°F51.9°F+1.8°NCLIMGRID
1994Apr54.5°F53.4°F+1.0°NCLIMGRID
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1994Nov48.7°F53.4°F-4.7°NCLIMGRID
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1995Jan51.6°F48.6°F+3.0°NCLIMGRID
1995Feb53.6°F50.7°F+2.9°NCLIMGRID
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1995Apr53.6°F53.4°F+0.2°NCLIMGRID
1995May56.1°F56.5°F-0.4°NCLIMGRID
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1995Nov56.4°F53.4°F+3.1°NCLIMGRID
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1996Jan51.2°F48.6°F+2.6°NCLIMGRID
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1996Dec52.3°F48.9°F+3.4°NCLIMGRID
1997Jan50.4°F48.6°F+1.8°NCLIMGRID
1997Feb51.4°F50.7°F+0.7°NCLIMGRID
1997Mar53.9°F51.9°F+1.9°NCLIMGRID
1997Apr55.3°F53.4°F+1.9°NCLIMGRID
1997May61.8°F56.5°F+5.2°NCLIMGRID
1997Jun60.5°F59.6°F+0.8°NCLIMGRID
1997Jul63.6°F62.2°F+1.4°NCLIMGRID
1997Aug65.2°F63.0°F+2.2°NCLIMGRID
1997Sep66.3°F63.1°F+3.2°NCLIMGRID
1997Oct59.4°F59.3°F+0.1°NCLIMGRID
1997Nov55.9°F53.4°F+2.6°NCLIMGRID
1997Dec49.5°F48.9°F+0.6°NCLIMGRID
1998Jan51.6°F48.6°F+3.0°NCLIMGRID
1998Feb49.9°F50.7°F-0.8°NCLIMGRID
1998Mar52.9°F51.9°F+1.0°NCLIMGRID
1998Apr53.0°F53.4°F-0.4°NCLIMGRID
1998May55.0°F56.5°F-1.6°NCLIMGRID
1998Jun58.7°F59.6°F-0.9°NCLIMGRID
1998Jul62.1°F62.2°F-0.1°NCLIMGRID
1998Aug64.9°F63.0°F+1.8°NCLIMGRID
1998Sep63.2°F63.1°F+0.0°NCLIMGRID
1998Oct58.0°F59.3°F-1.3°NCLIMGRID
1998Nov52.7°F53.4°F-0.7°NCLIMGRID
1998Dec47.0°F48.9°F-1.9°NCLIMGRID
1999Jan49.3°F48.6°F+0.7°NCLIMGRID
1999Feb48.4°F50.7°F-2.3°NCLIMGRID
1999Mar48.7°F51.9°F-3.2°NCLIMGRID
1999Apr52.7°F53.4°F-0.7°NCLIMGRID
1999May54.1°F56.5°F-2.4°NCLIMGRID
1999Jun58.6°F59.6°F-1.0°NCLIMGRID
1999Jul61.2°F62.2°F-1.0°NCLIMGRID
1999Aug62.3°F63.0°F-0.7°NCLIMGRID
1999Sep63.1°F63.1°F-0.1°NCLIMGRID
1999Oct61.5°F59.3°F+2.2°NCLIMGRID
1999Nov54.7°F53.4°F+1.3°NCLIMGRID
1999Dec50.3°F48.9°F+1.4°NCLIMGRID
2000Jan50.6°F48.6°F+2.0°NCLIMGRID
2000Feb51.5°F50.7°F+0.8°NCLIMGRID
2000Mar52.5°F51.9°F+0.5°NCLIMGRID
2000Apr56.0°F53.4°F+2.5°NCLIMGRID
2000May58.2°F56.5°F+1.6°NCLIMGRID
2000Jun61.3°F59.6°F+1.7°NCLIMGRID
2000Jul60.8°F62.2°F-1.4°NCLIMGRID
2000Aug62.7°F63.0°F-0.4°NCLIMGRID
2000Sep64.4°F63.1°F+1.2°NCLIMGRID
2000Oct58.1°F59.3°F-1.2°NCLIMGRID
2000Nov50.8°F53.4°F-2.6°NCLIMGRID
2000Dec51.3°F48.9°F+2.4°NCLIMGRID
2001Jan48.1°F48.6°F-0.5°NCLIMGRID
2001Feb49.2°F50.7°F-1.4°NCLIMGRID
2001Mar54.4°F51.9°F+2.5°NCLIMGRID
2001Apr51.5°F53.4°F-1.9°NCLIMGRID
2001May61.8°F56.5°F+5.3°NCLIMGRID
2001Jun61.9°F59.6°F+2.2°NCLIMGRID
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2001Nov55.3°F53.4°F+1.9°NCLIMGRID
2001Dec50.3°F48.9°F+1.4°NCLIMGRID
2002Jan47.7°F48.6°F-0.9°NCLIMGRID
2002Feb52.1°F50.7°F+1.4°NCLIMGRID
2002Mar51.7°F51.9°F-0.3°NCLIMGRID
2002Apr54.6°F53.4°F+1.2°NCLIMGRID
2002May56.0°F56.5°F-0.6°NCLIMGRID
2002Jun59.5°F59.6°F-0.1°NCLIMGRID
2002Jul62.9°F62.2°F+0.7°NCLIMGRID
2002Aug63.4°F63.0°F+0.4°NCLIMGRID
2002Sep64.0°F63.1°F+0.8°NCLIMGRID
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2002Nov56.1°F53.4°F+2.7°NCLIMGRID
2002Dec50.5°F48.9°F+1.6°NCLIMGRID
2003Jan53.8°F48.6°F+5.2°NCLIMGRID
2003Feb50.6°F50.7°F-0.1°NCLIMGRID
2003Mar54.0°F51.9°F+2.0°NCLIMGRID
2003Apr51.4°F53.4°F-2.0°NCLIMGRID
2003May57.2°F56.5°F+0.6°NCLIMGRID
2003Jun61.4°F59.6°F+1.7°NCLIMGRID
2003Jul64.1°F62.2°F+1.9°NCLIMGRID
2003Aug64.7°F63.0°F+1.6°NCLIMGRID
2003Sep65.8°F63.1°F+2.6°NCLIMGRID
2003Oct62.3°F59.3°F+3.0°NCLIMGRID
2003Nov52.3°F53.4°F-1.1°NCLIMGRID
2003Dec50.6°F48.9°F+1.7°NCLIMGRID
2004Jan49.1°F48.6°F+0.5°NCLIMGRID
2004Feb50.1°F50.7°F-0.6°NCLIMGRID
2004Mar57.1°F51.9°F+5.2°NCLIMGRID
2004Apr56.4°F53.4°F+3.0°NCLIMGRID
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2004Jun60.0°F59.6°F+0.4°NCLIMGRID
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2004Aug65.1°F63.0°F+2.1°NCLIMGRID
2004Sep64.3°F63.1°F+1.1°NCLIMGRID
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2004Nov53.0°F53.4°F-0.4°NCLIMGRID
2004Dec50.6°F48.9°F+1.7°NCLIMGRID
2005Jan48.8°F48.6°F+0.3°NCLIMGRID
2005Feb52.9°F50.7°F+2.2°NCLIMGRID
2005Mar55.1°F51.9°F+3.1°NCLIMGRID
2005Apr53.7°F53.4°F+0.3°NCLIMGRID
2005May58.6°F56.5°F+2.1°NCLIMGRID
2005Jun59.1°F59.6°F-0.5°NCLIMGRID
2005Jul64.0°F62.2°F+1.9°NCLIMGRID
2005Aug63.1°F63.0°F+0.1°NCLIMGRID
2005Sep61.1°F63.1°F-2.1°NCLIMGRID
2005Oct58.9°F59.3°F-0.4°NCLIMGRID
2005Nov55.8°F53.4°F+2.4°NCLIMGRID
2005Dec52.2°F48.9°F+3.3°NCLIMGRID
2006Jan50.1°F48.6°F+1.5°NCLIMGRID
2006Feb51.3°F50.7°F+0.6°NCLIMGRID
2006Mar48.5°F51.9°F-3.4°NCLIMGRID
2006Apr53.9°F53.4°F+0.5°NCLIMGRID
2006May58.3°F56.5°F+1.7°NCLIMGRID
2006Jun62.0°F59.6°F+2.3°NCLIMGRID
2006Jul65.8°F62.2°F+3.7°NCLIMGRID
2006Aug62.9°F63.0°F-0.1°NCLIMGRID
2006Sep61.6°F63.1°F-1.6°NCLIMGRID
2006Oct58.9°F59.3°F-0.4°NCLIMGRID
2006Nov53.6°F53.4°F+0.2°NCLIMGRID
2006Dec49.7°F48.9°F+0.8°NCLIMGRID
2007Jan47.0°F48.6°F-1.6°NCLIMGRID
2007Feb50.6°F50.7°F-0.1°NCLIMGRID
2007Mar53.5°F51.9°F+1.6°NCLIMGRID
2007Apr53.7°F53.4°F+0.3°NCLIMGRID
2007May57.2°F56.5°F+0.6°NCLIMGRID
2007Jun59.7°F59.6°F+0.1°NCLIMGRID
2007Jul63.2°F62.2°F+1.1°NCLIMGRID
2007Aug64.0°F63.0°F+1.0°NCLIMGRID
2007Sep62.9°F63.1°F-0.3°NCLIMGRID
2007Oct58.1°F59.3°F-1.2°NCLIMGRID
2007Nov54.7°F53.4°F+1.3°NCLIMGRID
2007Dec47.9°F48.9°F-1.0°NCLIMGRID
2008Jan47.3°F48.6°F-1.3°NCLIMGRID
2008Feb49.7°F50.7°F-1.0°NCLIMGRID
2008Mar51.5°F51.9°F-0.4°NCLIMGRID
2008Apr53.3°F53.4°F-0.1°NCLIMGRID
2008May57.4°F56.5°F+0.8°NCLIMGRID
2008Jun60.0°F59.6°F+0.4°NCLIMGRID
2008Jul63.3°F62.2°F+1.1°NCLIMGRID
2008Aug64.0°F63.0°F+1.0°NCLIMGRID
2008Sep63.4°F63.1°F+0.2°NCLIMGRID
2008Oct60.5°F59.3°F+1.2°NCLIMGRID
2008Nov55.9°F53.4°F+2.5°NCLIMGRID
2008Dec47.7°F48.9°F-1.2°NCLIMGRID
2009Jan52.2°F48.6°F+3.6°NCLIMGRID
2009Feb50.4°F50.7°F-0.3°NCLIMGRID
2009Mar51.6°F51.9°F-0.3°NCLIMGRID
2009Apr54.4°F53.4°F+1.0°NCLIMGRID
2009May57.8°F56.5°F+1.3°NCLIMGRID
2009Jun60.8°F59.6°F+1.2°NCLIMGRID
2009Jul62.4°F62.2°F+0.2°NCLIMGRID
2009Aug64.5°F63.0°F+1.5°NCLIMGRID
2009Sep64.2°F63.1°F+1.0°NCLIMGRID
2009Oct59.1°F59.3°F-0.2°NCLIMGRID
2009Nov53.0°F53.4°F-0.4°NCLIMGRID
2009Dec48.0°F48.9°F-0.9°NCLIMGRID
2010Jan50.6°F48.6°F+2.1°NCLIMGRID
2010Feb51.5°F50.7°F+0.8°NCLIMGRID
2010Mar52.5°F51.9°F+0.6°NCLIMGRID
2010Apr52.7°F53.4°F-0.7°NCLIMGRID
2010May54.8°F56.5°F-1.8°NCLIMGRID
2010Jun59.8°F59.6°F+0.1°NCLIMGRID
2010Jul61.9°F62.2°F-0.3°NCLIMGRID
2010Aug62.4°F63.0°F-0.6°NCLIMGRID
2010Sep63.3°F63.1°F+0.2°NCLIMGRID
2010Oct59.9°F59.3°F+0.6°NCLIMGRID
2010Nov53.1°F53.4°F-0.3°NCLIMGRID
2010Dec51.1°F48.9°F+2.2°NCLIMGRID
2011Jan50.8°F48.6°F+2.2°NCLIMGRID
2011Feb48.9°F50.7°F-1.7°NCLIMGRID
2011Mar52.4°F51.9°F+0.5°NCLIMGRID
2011Apr53.6°F53.4°F+0.2°NCLIMGRID
2011May55.0°F56.5°F-1.5°NCLIMGRID
2011Jun59.1°F59.6°F-0.5°NCLIMGRID
2011Jul62.4°F62.2°F+0.2°NCLIMGRID
2011Aug62.3°F63.0°F-0.8°NCLIMGRID
2011Sep63.5°F63.1°F+0.4°NCLIMGRID
2011Oct61.8°F59.3°F+2.5°NCLIMGRID
2011Nov52.1°F53.4°F-1.3°NCLIMGRID
2011Dec48.3°F48.9°F-0.6°NCLIMGRID
2012Jan50.2°F48.6°F+1.6°NCLIMGRID
2012Feb50.5°F50.7°F-0.2°NCLIMGRID
2012Mar51.0°F51.9°F-0.9°NCLIMGRID
2012Apr55.2°F53.4°F+1.8°NCLIMGRID
2012May56.8°F56.5°F+0.2°NCLIMGRID
2012Jun59.7°F59.6°F+0.1°NCLIMGRID
2012Jul62.4°F62.2°F+0.2°NCLIMGRID
2012Aug62.3°F63.0°F-0.8°NCLIMGRID
2012Sep60.7°F63.1°F-2.4°NCLIMGRID
2012Oct61.5°F59.3°F+2.2°NCLIMGRID
2012Nov56.2°F53.4°F+2.8°NCLIMGRID
2012Dec50.1°F48.9°F+1.2°NCLIMGRID
2013Jan48.6°F48.6°F+0.0°NCLIMGRID
2013Feb48.7°F50.7°F-1.9°NCLIMGRID
2013Mar53.8°F51.9°F+1.9°NCLIMGRID
2013Apr57.0°F53.4°F+3.5°NCLIMGRID
2013May58.7°F56.5°F+2.1°NCLIMGRID
2013Jun61.4°F59.6°F+1.8°NCLIMGRID
2013Jul63.5°F62.2°F+1.4°NCLIMGRID
2013Aug65.0°F63.0°F+2.0°NCLIMGRID
2013Sep64.3°F63.1°F+1.2°NCLIMGRID
2013Oct58.5°F59.3°F-0.8°NCLIMGRID
2013Nov54.8°F53.4°F+1.4°NCLIMGRID
2013Dec48.8°F48.9°F-0.1°NCLIMGRID
2014Jan53.1°F48.6°F+4.5°NCLIMGRID
2014Feb52.6°F50.7°F+1.9°NCLIMGRID
2014Mar56.0°F51.9°F+4.1°NCLIMGRID
2014Apr56.4°F53.4°F+3.0°NCLIMGRID
2014May60.4°F56.5°F+3.9°NCLIMGRID
2014Jun61.3°F59.6°F+1.6°NCLIMGRID
2014Jul66.0°F62.2°F+3.8°NCLIMGRID
2014Aug66.3°F63.0°F+3.3°NCLIMGRID
2014Sep66.2°F63.1°F+3.1°NCLIMGRID
2014Oct63.5°F59.3°F+4.2°NCLIMGRID
2014Nov56.8°F53.4°F+3.4°NCLIMGRID
2014Dec54.7°F48.9°F+5.8°NCLIMGRID
2015Jan53.2°F48.6°F+4.7°NCLIMGRID
2015Feb56.0°F50.7°F+5.3°NCLIMGRID
2015Mar56.9°F51.9°F+5.0°NCLIMGRID
2015Apr55.4°F53.4°F+2.0°NCLIMGRID
2015May57.9°F56.5°F+1.3°NCLIMGRID
2015Jun62.5°F59.6°F+2.9°NCLIMGRID
2015Jul65.9°F62.2°F+3.8°NCLIMGRID
2015Aug67.5°F63.0°F+4.5°NCLIMGRID
2015Sep66.2°F63.1°F+3.1°NCLIMGRID
2015Oct64.0°F59.3°F+4.7°NCLIMGRID
2015Nov52.2°F53.4°F-1.2°NCLIMGRID
2015Dec48.7°F48.9°F-0.2°NCLIMGRID
2016Jan51.9°F48.6°F+3.3°NCLIMGRID
2016Feb55.0°F50.7°F+4.3°NCLIMGRID
2016Mar55.0°F51.9°F+3.0°NCLIMGRID
2016Apr57.6°F53.4°F+4.2°NCLIMGRID
2016May59.4°F56.5°F+2.9°NCLIMGRID
2016Jun61.7°F59.6°F+2.1°NCLIMGRID
2016Jul62.2°F62.2°F+0.1°NCLIMGRID
2016Aug63.5°F63.0°F+0.5°NCLIMGRID
2016Sep63.5°F63.1°F+0.4°NCLIMGRID
2016Oct60.5°F59.3°F+1.2°NCLIMGRID
2016Nov55.5°F53.4°F+2.1°NCLIMGRID
2016Dec48.7°F48.9°F-0.2°NCLIMGRID
2017Jan48.7°F48.6°F+0.2°NCLIMGRID
2017Feb52.3°F50.7°F+1.6°NCLIMGRID
2017Mar54.8°F51.9°F+2.8°NCLIMGRID
2017Apr55.9°F53.4°F+2.4°NCLIMGRID
2017May58.5°F56.5°F+1.9°NCLIMGRID
2017Jun61.7°F59.6°F+2.1°NCLIMGRID
2017Jul63.4°F62.2°F+1.2°NCLIMGRID
2017Aug65.2°F63.0°F+2.2°NCLIMGRID
2017Sep67.7°F63.1°F+4.6°NCLIMGRID
2017Oct61.2°F59.3°F+1.9°NCLIMGRID
2017Nov55.4°F53.4°F+2.1°NCLIMGRID
2017Dec51.1°F48.9°F+2.2°NCLIMGRID
2018Jan52.4°F48.6°F+3.8°NCLIMGRID
2018Feb51.1°F50.7°F+0.4°NCLIMGRID
2018Mar52.6°F51.9°F+0.7°NCLIMGRID
2018Apr55.1°F53.4°F+1.7°NCLIMGRID
2018May57.9°F56.5°F+1.4°NCLIMGRID
2018Jun60.7°F59.6°F+1.0°NCLIMGRID
2018Jul64.5°F62.2°F+2.3°NCLIMGRID
2018Aug63.6°F63.0°F+0.6°NCLIMGRID
2018Sep61.8°F63.1°F-1.3°NCLIMGRID
2018Oct60.8°F59.3°F+1.5°NCLIMGRID
2018Nov54.8°F53.4°F+1.4°NCLIMGRID
2018Dec51.0°F48.9°F+2.1°NCLIMGRID
2019Jan52.4°F48.6°F+3.9°NCLIMGRID
2019Feb47.8°F50.7°F-2.8°NCLIMGRID
2019Mar52.6°F51.9°F+0.6°NCLIMGRID
2019Apr57.0°F53.4°F+3.5°NCLIMGRID
2019May57.4°F56.5°F+0.8°NCLIMGRID
2019Jun63.3°F59.6°F+3.6°NCLIMGRID
2019Jul63.7°F62.2°F+1.5°NCLIMGRID
2019Aug67.2°F63.0°F+4.2°NCLIMGRID
2019Sep65.8°F63.1°F+2.7°NCLIMGRID
2019Oct61.2°F59.3°F+1.9°NCLIMGRID
2019Nov54.4°F53.4°F+1.1°NCLIMGRID
2019Dec51.9°F48.9°F+3.0°NCLIMGRID
2020Jan49.7°F48.6°F+1.2°NCLIMGRID
2020Feb53.0°F50.7°F+2.4°NCLIMGRID
2020Mar52.5°F51.9°F+0.6°NCLIMGRID
2020Apr55.6°F53.4°F+2.2°NCLIMGRID
2020May59.8°F56.5°F+3.2°NCLIMGRID
2020Jun62.3°F59.6°F+2.7°NCLIMGRID
2020Jul63.5°F62.2°F+1.3°NCLIMGRID
2020Aug67.3°F63.0°F+4.3°NCLIMGRID
2020Sep67.6°F63.1°F+4.5°NCLIMGRID
2020Oct64.9°F59.3°F+5.5°NCLIMGRID
2020Nov53.5°F53.4°F+0.1°NCLIMGRID
2020Dec50.2°F48.9°F+1.3°NCLIMGRID
2021Jan50.8°F48.6°F+2.2°NCLIMGRID
2021Feb50.9°F50.7°F+0.2°NCLIMGRID
2021Mar50.9°F51.9°F-1.0°NCLIMGRID
2021Apr54.1°F53.4°F+0.7°NCLIMGRID
2021May56.7°F56.5°F+0.2°NCLIMGRID
2021Jun62.0°F59.6°F+2.3°NCLIMGRID
2021Jul63.4°F62.2°F+1.2°NCLIMGRID
2021Aug64.9°F63.0°F+1.9°NCLIMGRID
2021Sep63.8°F63.1°F+0.7°NCLIMGRID
2021Oct59.5°F59.3°F+0.2°NCLIMGRID
2021Nov56.9°F53.4°F+3.5°NCLIMGRID
2021Dec49.0°F48.9°F+0.1°NCLIMGRID
2022Jan50.8°F48.6°F+2.2°NCLIMGRID
2022Feb50.9°F50.7°F+0.3°NCLIMGRID
2022Mar53.0°F51.9°F+1.1°NCLIMGRID
2022Apr53.9°F53.4°F+0.5°NCLIMGRID
2022May56.8°F56.5°F+0.2°NCLIMGRID
2022Jun61.2°F59.6°F+1.5°NCLIMGRID
2022Jul62.0°F62.2°F-0.1°NCLIMGRID
2022Aug65.1°F63.0°F+2.1°NCLIMGRID
2022Sep65.9°F63.1°F+2.7°NCLIMGRID
2022Oct59.0°F59.3°F-0.3°NCLIMGRID
2022Nov50.4°F53.4°F-2.9°NCLIMGRID
2022Dec48.1°F48.9°F-0.8°NCLIMGRID
2023Jan50.1°F48.6°F+1.5°NCLIMGRID
2023Feb46.9°F50.7°F-3.8°NCLIMGRID
2023Mar49.0°F51.9°F-3.0°NCLIMGRID
2023Apr52.9°F53.4°F-0.6°NCLIMGRID
2023May57.1°F56.5°F+0.5°NCLIMGRID
2023Jun59.3°F59.6°F-0.3°NCLIMGRID
2023Jul62.3°F62.2°F+0.1°NCLIMGRID
2023Aug65.6°F63.0°F+2.6°NCLIMGRID
2023Sep63.7°F63.1°F+0.5°NCLIMGRID
2023Oct61.8°F59.3°F+2.5°NCLIMGRID
2023Nov56.1°F53.4°F+2.7°NCLIMGRID
2023Dec52.7°F48.9°F+3.8°NCLIMGRID
2024Jan51.8°F48.6°F+3.2°NCLIMGRID
2024Feb51.7°F50.7°F+1.0°NCLIMGRID
2024Mar53.4°F51.9°F+1.4°NCLIMGRID
2024Apr54.5°F53.4°F+1.1°NCLIMGRID
2024May57.4°F56.5°F+0.9°NCLIMGRID
2024Jun60.1°F59.6°F+0.5°NCLIMGRID
2024Jul66.3°F62.2°F+4.1°NCLIMGRID
2024Aug64.0°F63.0°F+1.0°NCLIMGRID
2024Sep62.9°F63.1°F-0.3°NCLIMGRID
2024Oct62.8°F59.3°F+3.5°NCLIMGRID
2024Nov52.6°F53.4°F-0.8°NCLIMGRID
2024Dec52.4°F48.9°F+3.5°NCLIMGRID
2025Jan49.4°F48.6°F+0.8°NCLIMGRID
2025Feb50.8°F50.7°F+0.1°NCLIMGRID
2025Mar52.4°F51.9°F+0.4°NCLIMGRID
2025Apr53.4°F53.4°F+0.0°NCLIMGRID
2025May57.1°F56.5°F+0.6°NCLIMGRID
2025Jun58.2°F59.6°F-1.4°NCLIMGRID
2025Jul61.6°F62.2°F-0.6°NCLIMGRID
2025Aug65.5°F63.0°F+2.5°NCLIMGRID
2025Sep66.0°F63.1°F+2.9°NCLIMGRID
2025Oct60.4°F59.3°F+1.1°NCLIMGRID
2025Nov56.1°F53.4°F+2.7°NCLIMGRID
2025Dec51.5°F48.9°F+2.6°NCLIMGRID
2026Jan53.4°F48.6°F+4.8°NCLIMGRID
2026Feb54.1°F50.7°F+3.5°NCLIMGRID

Showing 1,154 of 1,154 records. = gap-filled data

This table shows raw (unsmoothed) monthly anomalies. The spiral applies a 12-month moving average to highlight long-term trends.

Methodology

Methodology How we calculate anomalies

1. Data Acquisition

We use NOAA's nClimGrid dataset, which provides homogenized temperature data on a 5km grid, for the nearest grid point with historical coverage starting from 1930.

Temperature metric: Monthly average temperature (TAVG). When TAVG is unavailable, we use (TMAX + TMIN) / 2 as a proxy.

2. Gap Filling

Some months may have missing data. We fill gaps using data from nearby weather stations (within ~200km).

10

Initial gaps

0

Filled

10

Unfillable

3. Baseline Calculation

The baseline is a 25-year window dynamically centered on the data's midpoint, requiring at least 90% coverage. If coverage is insufficient, the window shifts forward in 5-year increments until the threshold is met.

Period: 1966 – 1991 (100% coverage)

MonthBaselineYears
January48.6°F26/26
February50.7°F26/26
March51.9°F26/26
April53.4°F26/26
May56.5°F26/26
June59.6°F26/26
July62.2°F26/26
August63.0°F26/26
September63.1°F26/26
October59.3°F26/26
November53.4°F26/26
December48.9°F26/26

4. Anomaly Calculation

For each month, we calculate how far it deviates from the baseline. These are raw monthly anomalies.

Anomaly = Actual Temperature − Baseline[month]

5. Smoothing

The spiral visualization applies a 12-month centered moving average to reduce month-to-month noise and highlight multi-year warming trends. The spiral shows smoothed values, not raw anomalies.

6. Reading the Visualizations

Spiral: A 3D helix where each loop represents one year. The radius indicates the smoothed temperature anomaly, and colors range from blue (cold) to red (warm). The top view shows the annual cycle, while the side view shows time progression.

Stripes: Each stripe represents one year's average anomaly (the mean of all monthly anomalies for that year). No additional smoothing is applied; yearly aggregation naturally reduces noise.

Color scale: Color bounds are set to the 5th and 95th percentile of anomalies to avoid outlier washout, with a neutral zone of approximately ±0.1°C.

7. Data Quality Notes

Frequently Asked Questions

Is Half Moon Bay, California getting warmer?

Based on 96+ years of NOAA temperature records, Half Moon Bay has warmed at a rate of approximately 0.28°F per decade. This trend is calculated from monthly temperature anomalies relative to the location's historical baseline period.

What was the warmest year on record in Half Moon Bay?

The warmest year on record in Half Moon Bay was 2014, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Half Moon Bay come from?

Data comes from the nClimGrid 5km Grid Point weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 96+ years of temperature observations used to build Half Moon Bay's climate profile.

How are the climate visualizations for Half Moon Bay created?

Three visualizations are generated from Half Moon Bay's NOAA data: a climate spiral showing monthly temperature anomalies as concentric rings (inspired by NASA), warming stripes where each vertical stripe represents one year's temperature anomaly, and a linear trend chart showing the long-term trajectory.

Can I download Half Moon Bay's temperature data?

Yes. The interactive data table on this page shows every monthly temperature reading in Half Moon Bay's record. You can filter by decade and download the complete dataset as a CSV file for your own analysis.

Wear Half Moon Bay's Climate Story

These visualizations are printed on demand using Half Moon Bay's actual NOAA data. Every purchase plants a tree.

Shop Half Moon Bay Climate Apparel →

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