Climate Change in Los Altos, California

96+ years of recorded temperature data show Los Altos is warming.

Based on our analysis of 96 years of temperature data near Los Altos, 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 +3.5°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.3°F

per decade

Warmest Year

2014

+3.5°F anomaly

Recent Warm Years

10 / 10

above-average years

Decade Shift

+2.8°F

2020s vs 1930s

Compared to the National Average

Los Altos is warming 0.1°F/decade faster than the national average.

National: +0.20°F/decade
Los Altos: +0.33°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 Los Altos's long-term warming trend.

Temperature anomaly spiral for Los Altos, California
Climate spiral: monthly temperature anomalies from 96+ years of NOAA records for Los Altos, 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 Los Altos, California
Warming stripes: each stripe is one year of average temperature anomaly for Los Altos, CA.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.33°F per decade quantifies the rate of change.

Temperature trend chart for Los Altos, California
Linear trend: annual temperature anomalies with trend line for Los Altos, CA.

Temperature by Decade

1930s
-0.76°F
1940s
-0.86°F
1950s
-0.64°F
1960s
-0.67°F
1970s
-0.39°F
1980s
+0.44°F
1990s
+0.78°F
2000s
+0.93°F
2010s
+1.67°F
2020s
+2.05°F

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

Anomaly Scale

-3.1°F Colder Normal +3.8°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 Los Altos, CA. Filter by decade or download as CSV.

Data Sources & Audit

Station
nClimGrid 5km Grid Point
Distance
0.8 mi
Coverage
99.1%
Records
1,154
Range
1930-01 – 2026-02
Full Data Audit 1,154 records
YearMonthTempBaselineAnomalySourceGap
1930Jan46.3°F47.8°F-1.5°NCLIMGRID
1930Feb52.4°F50.3°F+2.1°NCLIMGRID
1930Mar53.1°F52.0°F+1.1°NCLIMGRID
1930Apr55.9°F54.3°F+1.7°NCLIMGRID
1930May54.3°F58.8°F-4.4°NCLIMGRID
1930Jun61.2°F63.0°F-1.8°NCLIMGRID
1930Jul62.8°F66.3°F-3.5°NCLIMGRID
1930Aug64.0°F66.7°F-2.7°NCLIMGRID
1930Sep61.7°F65.7°F-4.0°NCLIMGRID
1930Oct59.8°F60.7°F-0.8°NCLIMGRID
1930Nov52.3°F53.1°F-0.8°NCLIMGRID
1930Dec46.3°F47.8°F-1.5°NCLIMGRID
1931Jan48.4°F47.8°F+0.5°NCLIMGRID
1931Feb51.4°F50.3°F+1.1°NCLIMGRID
1931Mar53.0°F52.0°F+1.0°NCLIMGRID
1931Apr56.0°F54.3°F+1.8°NCLIMGRID
1931May62.2°F58.8°F+3.4°NCLIMGRID
1931Jun61.8°F63.0°F-1.3°NCLIMGRID
1931Jul68.4°F66.3°F+2.1°NCLIMGRID
1931Aug66.9°F66.7°F+0.1°NCLIMGRID
1931Sep63.6°F65.7°F-2.1°NCLIMGRID
1931Oct58.0°F60.7°F-2.7°NCLIMGRID
1931Nov50.3°F53.1°F-2.9°NCLIMGRID
1931Dec46.1°F47.8°F-1.7°NCLIMGRID
1932Jan45.7°F47.8°F-2.1°NCLIMGRID
1932Feb47.1°F50.3°F-3.2°NCLIMGRID
1932Mar52.8°F52.0°F+0.8°NCLIMGRID
1932Apr52.4°F54.3°F-1.9°NCLIMGRID
1932May57.9°F58.8°F-0.9°NCLIMGRID
1932Jun61.8°F63.0°F-1.3°NCLIMGRID
1932Jul64.4°F66.3°F-2.0°NCLIMGRID
1932Aug65.0°F66.7°F-1.7°NCLIMGRID
1932Sep65.2°F65.7°F-0.5°NCLIMGRID
1932Oct60.2°F60.7°F-0.5°NCLIMGRID
1932Nov56.7°F53.1°F+3.5°NCLIMGRID
1932Dec43.6°F47.8°F-4.3°NCLIMGRID
1933Jan43.6°F47.8°F-4.2°NCLIMGRID
1933Feb45.7°F50.3°F-4.6°NCLIMGRID
1933Mar51.4°F52.0°F-0.6°NCLIMGRID
1933Apr52.6°F54.3°F-1.7°NCLIMGRID
1933May53.7°F58.8°F-5.1°NCLIMGRID
1933Jun58.8°F63.0°F-4.3°NCLIMGRID
1933Jul65.6°F66.3°F-0.8°NCLIMGRID
1933Aug65.6°F66.7°F-1.2°NCLIMGRID
1933Sep62.4°F65.7°F-3.3°NCLIMGRID
1933Oct62.5°F60.7°F+1.9°NCLIMGRID
1933Nov55.1°F53.1°F+1.9°NCLIMGRID
1933Dec47.6°F47.8°F-0.2°NCLIMGRID
1934Jan48.4°F47.8°F+0.6°NCLIMGRID
1934Feb51.4°F50.3°F+1.2°NCLIMGRID
1934Mar56.8°F52.0°F+4.8°NCLIMGRID
1934Apr56.8°F54.3°F+2.5°NCLIMGRID
1934May60.1°F58.8°F+1.3°NCLIMGRID
1934Jun61.8°F63.0°F-1.2°NCLIMGRID
1934Jul64.9°F66.3°F-1.4°NCLIMGRID
1934Aug65.5°F66.7°F-1.2°NCLIMGRID
1934Sep64.8°F65.7°F-0.9°NCLIMGRID
1934Oct59.7°F60.7°F-0.9°NCLIMGRID
1934Nov54.4°F53.1°F+1.3°NCLIMGRID
1934Dec48.8°F47.8°F+0.9°NCLIMGRID
1935Jan46.9°F47.8°F-0.9°NCLIMGRID
1935Feb49.1°F50.3°F-1.2°NCLIMGRID
1935Mar47.1°F52.0°F-4.8°NCLIMGRID
1935Apr53.9°F54.3°F-0.4°NCLIMGRID
1935May57.4°F58.8°F-1.3°NCLIMGRID
1935Jun62.9°F63.0°F-0.1°NCLIMGRID
1935Jul64.8°F66.3°F-1.5°NCLIMGRID
1935Aug65.5°F66.7°F-1.3°NCLIMGRID
1935Sep63.3°F65.7°F-2.4°NCLIMGRID
1935Oct58.0°F60.7°F-2.6°NCLIMGRID
1935Nov50.2°F53.1°F-3.0°NCLIMGRID
1935Dec48.2°F47.8°F+0.4°NCLIMGRID
1936Jan49.9°F47.8°F+2.1°NCLIMGRID
1936Feb49.0°F50.3°F-1.3°NCLIMGRID
1936Mar52.2°F52.0°F+0.2°NCLIMGRID
1936Apr54.9°F54.3°F+0.7°NCLIMGRID
1936May60.5°F58.8°F+1.7°NCLIMGRID
1936Jun62.7°F63.0°F-0.4°NCLIMGRID
1936Jul66.5°F66.3°F+0.2°NCLIMGRID
1936Aug66.7°F66.7°F-0.1°NCLIMGRID
1936Sep65.8°F65.7°F+0.1°NCLIMGRID
1936Oct61.4°F60.7°F+0.7°NCLIMGRID
1936Nov52.8°F53.1°F-0.4°NCLIMGRID
1936Dec46.6°F47.8°F-1.3°NCLIMGRID
1937Jan40.2°F47.8°F-7.6°NCLIMGRID
1937Feb46.5°F50.3°F-3.7°NCLIMGRID
1937Mar51.3°F52.0°F-0.6°NCLIMGRID
1937Apr52.0°F54.3°F-2.2°NCLIMGRID
1937May58.2°F58.8°F-0.6°NCLIMGRID
1937Jun63.1°F63.0°F+0.1°NCLIMGRID
1937Jul66.5°F66.3°F+0.2°NCLIMGRID
1937Aug66.3°F66.7°F-0.4°NCLIMGRID
1937Sep64.8°F65.7°F-0.9°NCLIMGRID
1937Oct61.4°F60.7°F+0.7°NCLIMGRID
1937Nov54.3°F53.1°F+1.2°NCLIMGRID
1937Dec49.6°F47.8°F+1.8°NCLIMGRID
1938Jan47.9°F47.8°F+0.1°NCLIMGRID
1938Feb48.8°F50.3°F-1.5°NCLIMGRID
1938Mar48.8°F52.0°F-3.1°NCLIMGRID
1938Apr52.7°F54.3°F-1.5°NCLIMGRID
1938May58.1°F58.8°F-0.7°NCLIMGRID
1938Jun61.9°F63.0°F-1.2°NCLIMGRID
1938Jul66.2°F66.3°F-0.1°NCLIMGRID
1938Aug65.6°F66.7°F-1.1°NCLIMGRID
1938Sep64.8°F65.7°F-0.9°NCLIMGRID
1938Oct59.2°F60.7°F-1.4°NCLIMGRID
1938Nov51.2°F53.1°F-2.0°NCLIMGRID
1938Dec49.4°F47.8°F+1.6°NCLIMGRID
1939Jan47.0°F47.8°F-0.8°NCLIMGRID
1939Feb46.1°F50.3°F-4.2°NCLIMGRID
1939Mar49.7°F52.0°F-2.2°NCLIMGRID
1939Apr55.7°F54.3°F+1.5°NCLIMGRID
1939May58.6°F58.8°F-0.2°NCLIMGRID
1939Jun61.7°F63.0°F-1.3°NCLIMGRID
1939Jul65.4°F66.3°F-0.9°NCLIMGRID
1939Aug65.6°F66.7°F-1.1°NCLIMGRID
1939Sep67.9°F65.7°F+2.2°NCLIMGRID
1939Oct60.4°F60.7°F-0.3°NCLIMGRID
1939Nov53.7°F53.1°F+0.6°NCLIMGRID
1939Dec50.5°F47.8°F+2.7°NCLIMGRID
1940Jan49.7°F47.8°F+1.9°NCLIMGRID
1940Feb51.2°F50.3°F+0.9°NCLIMGRID
1940Mar53.5°F52.0°F+1.6°NCLIMGRID
1940Apr55.6°F54.3°F+1.3°NCLIMGRID
1940May59.1°F58.8°F+0.3°NCLIMGRID
1940Jun63.7°F63.0°F+0.6°NCLIMGRID
1940Jul66.2°F66.3°F-0.1°NCLIMGRID
1940Aug65.8°F66.7°F-1.0°NCLIMGRID
1940Sep65.4°F65.7°F-0.3°NCLIMGRID
1940Oct60.5°F60.7°F-0.1°NCLIMGRID
1940Nov52.1°F53.1°F-1.0°NCLIMGRID
1940Dec51.0°F47.8°F+3.2°NCLIMGRID
1941Jan49.9°F47.8°F+2.1°NCLIMGRID
1941Feb51.3°F50.3°F+1.0°NCLIMGRID
1941Mar54.2°F52.0°F+2.3°NCLIMGRID
1941Apr53.1°F54.3°F-1.2°NCLIMGRID
1941May60.7°F58.8°F+1.9°NCLIMGRID
1941Jun61.8°F63.0°F-1.3°NCLIMGRID
1941Jul67.0°F66.3°F+0.7°NCLIMGRID
1941Aug65.1°F66.7°F-1.6°NCLIMGRID
1941Sep64.6°F65.7°F-1.1°NCLIMGRID
1941Oct58.5°F60.7°F-2.2°NCLIMGRID
1941Nov54.3°F53.1°F+1.2°NCLIMGRID
1941Dec49.5°F47.8°F+1.7°NCLIMGRID
1942Jan47.6°F47.8°F-0.2°NCLIMGRID
1942Feb48.1°F50.3°F-2.2°NCLIMGRID
1942Mar50.5°F52.0°F-1.4°NCLIMGRID
1942Apr53.0°F54.3°F-1.3°NCLIMGRID
1942May56.7°F58.8°F-2.1°NCLIMGRID
1942Jun61.7°F63.0°F-1.3°NCLIMGRID
1942Jul66.5°F66.3°F+0.2°NCLIMGRID
1942Aug65.5°F66.7°F-1.3°NCLIMGRID
1942Sep63.3°F65.7°F-2.4°NCLIMGRID
1942Oct59.8°F60.7°F-0.9°NCLIMGRID
1942Nov52.1°F53.1°F-1.0°NCLIMGRID
1942Dec47.9°F47.8°F+0.1°NCLIMGRID
1943Jan47.2°F47.8°F-0.6°NCLIMGRID
1943Feb50.3°F50.3°F+0.0°NCLIMGRID
1943Mar52.7°F52.0°F+0.8°NCLIMGRID
1943Apr54.7°F54.3°F+0.5°NCLIMGRID
1943May59.6°F58.8°F+0.9°NCLIMGRID
1943Jun60.5°F63.0°F-2.5°NCLIMGRID
1943Jul65.4°F66.3°F-0.9°NCLIMGRID
1943Aug65.0°F66.7°F-1.8°NCLIMGRID
1943Sep66.5°F65.7°F+0.8°NCLIMGRID
1943Oct59.6°F60.7°F-1.1°NCLIMGRID
1943Nov54.1°F53.1°F+0.9°NCLIMGRID
1943Dec49.0°F47.8°F+1.1°NCLIMGRID
1944Jan47.9°F47.8°F+0.1°NCLIMGRID
1944Feb47.0°F50.3°F-3.3°NCLIMGRID
1944Mar51.5°F52.0°F-0.4°NCLIMGRID
1944Apr51.2°F54.3°F-3.1°NCLIMGRID
1944May58.1°F58.8°F-0.7°NCLIMGRID
1944Jun60.6°F63.0°F-2.4°NCLIMGRID
1944Jul64.3°F66.3°F-2.0°NCLIMGRID
1944Aug65.0°F66.7°F-1.8°NCLIMGRID
1944Sep64.9°F65.7°F-0.8°NCLIMGRID
1944Oct60.9°F60.7°F+0.2°NCLIMGRID
1944Nov51.1°F53.1°F-2.0°NCLIMGRID
1944Dec49.4°F47.8°F+1.6°NCLIMGRID
1945Jan45.8°F47.8°F-2.0°NCLIMGRID
1945Feb49.1°F50.3°F-1.2°NCLIMGRID
1945Mar47.6°F52.0°F-4.3°NCLIMGRID
1945Apr53.4°F54.3°F-0.8°NCLIMGRID
1945May56.5°F58.8°F-2.2°NCLIMGRID
1945Jun63.8°F63.0°F+0.8°NCLIMGRID
1945Jul67.0°F66.3°F+0.7°NCLIMGRID
1945Aug64.8°F66.7°F-2.0°NCLIMGRID
1945Sep65.5°F65.7°F-0.2°NCLIMGRID
1945Oct60.7°F60.7°F+0.1°NCLIMGRID
1945Nov52.3°F53.1°F-0.8°NCLIMGRID
1945Dec49.1°F47.8°F+1.2°NCLIMGRID
1946Jan46.3°F47.8°F-1.5°NCLIMGRID
1946Feb46.0°F50.3°F-4.3°NCLIMGRID
1946Mar49.9°F52.0°F-2.0°NCLIMGRID
1946Apr53.6°F54.3°F-0.7°NCLIMGRID
1946May57.5°F58.8°F-1.2°NCLIMGRID
1946Jun61.4°F63.0°F-1.6°NCLIMGRID
1946Jul66.1°F66.3°F-0.2°NCLIMGRID
1946Aug64.9°F66.7°F-1.8°NCLIMGRID
1946Sep65.1°F65.7°F-0.6°NCLIMGRID
1946Oct58.0°F60.7°F-2.7°NCLIMGRID
1946Nov50.1°F53.1°F-3.1°NCLIMGRID
1946Dec47.6°F47.8°F-0.3°NCLIMGRID
1947Jan43.1°F47.8°F-4.7°NCLIMGRID
1947Feb50.0°F50.3°F-0.2°NCLIMGRID
1947Mar53.2°F52.0°F+1.2°NCLIMGRID
1947Apr56.6°F54.3°F+2.4°NCLIMGRID
1947May60.3°F58.8°F+1.5°NCLIMGRID
1947Jun64.6°F63.0°F+1.5°NCLIMGRID
1947Jul64.7°F66.3°F-1.6°NCLIMGRID
1947Aug66.2°F66.7°F-0.5°NCLIMGRID
1947Sep65.2°F65.7°F-0.5°NCLIMGRID
1947Oct60.4°F60.7°F-0.3°NCLIMGRID
1947Nov49.4°F53.1°F-3.7°NCLIMGRID
1947Dec46.6°F47.8°F-1.2°NCLIMGRID
1948Jan49.7°F47.8°F+1.9°NCLIMGRID
1948Feb46.7°F50.3°F-3.6°NCLIMGRID
1948Mar48.4°F52.0°F-3.6°NCLIMGRID
1948Apr51.9°F54.3°F-2.4°NCLIMGRID
1948May55.7°F58.8°F-3.1°NCLIMGRID
1948Jun61.9°F63.0°F-1.1°NCLIMGRID
1948Jul65.0°F66.3°F-1.4°NCLIMGRID
1948Aug65.6°F66.7°F-1.1°NCLIMGRID
1948Sep62.9°F65.7°F-2.8°NCLIMGRID
1948Oct59.5°F60.7°F-1.2°NCLIMGRID
1948Nov51.9°F53.1°F-1.2°NCLIMGRID
1948Dec43.9°F47.8°F-4.0°NCLIMGRID
1949Jan39.7°F47.8°F-8.1°NCLIMGRID
1949Feb44.7°F50.3°F-5.5°NCLIMGRID
1949Mar50.4°F52.0°F-1.6°NCLIMGRID
1949Apr55.1°F54.3°F+0.9°NCLIMGRID
1949May58.0°F58.8°F-0.8°NCLIMGRID
1949Jun63.0°F63.0°F+0.0°NCLIMGRID
1949Jul64.0°F66.3°F-2.4°NCLIMGRID
1949Aug64.2°F66.7°F-2.6°NCLIMGRID
1949Sep65.3°F65.7°F-0.4°NCLIMGRID
1949Oct57.4°F60.7°F-3.3°NCLIMGRID
1949Nov55.9°F53.1°F+2.8°NCLIMGRID
1949Dec45.7°F47.8°F-2.2°NCLIMGRID
1950Jan43.8°F47.8°F-4.0°NCLIMGRID
1950Feb47.9°F50.3°F-2.4°NCLIMGRID
1950Mar49.8°F52.0°F-2.1°NCLIMGRID
1950Apr54.7°F54.3°F+0.4°NCLIMGRID
1950May57.2°F58.8°F-1.6°NCLIMGRID
1950Jun60.2°F63.0°F-2.9°NCLIMGRID
1950Jul65.6°F66.3°F-0.8°NCLIMGRID
1950Aug66.8°F66.7°F+0.0°NCLIMGRID
1950Sep65.7°F65.7°F+0.0°NCLIMGRID
1950Oct60.5°F60.7°F-0.2°NCLIMGRID
1950Nov57.7°F53.1°F+4.6°NCLIMGRID
1950Dec51.1°F47.8°F+3.3°NCLIMGRID
1951Jan47.6°F47.8°F-0.2°NCLIMGRID
1951Feb48.2°F50.3°F-2.1°NCLIMGRID
1951Mar50.5°F52.0°F-1.4°NCLIMGRID
1951Apr52.2°F54.3°F-2.1°NCLIMGRID
1951May58.6°F58.8°F-0.2°NCLIMGRID
1951Jun60.7°F63.0°F-2.4°NCLIMGRID
1951Jul63.9°F66.3°F-2.4°NCLIMGRID
1951Aug64.9°F66.7°F-1.9°NCLIMGRID
1951Sep64.1°F65.7°F-1.6°NCLIMGRID
1951Oct59.7°F60.7°F-1.0°NCLIMGRID
1951Nov53.4°F53.1°F+0.3°NCLIMGRID
1951Dec46.4°F47.8°F-1.4°NCLIMGRID
1952Jan45.2°F47.8°F-2.6°NCLIMGRID
1952Feb48.4°F50.3°F-1.9°NCLIMGRID
1952Mar48.3°F52.0°F-3.7°NCLIMGRID
1952Apr54.0°F54.3°F-0.2°NCLIMGRID
1952May59.0°F58.8°F+0.2°NCLIMGRID
1952Jun59.2°F63.0°F-3.8°NCLIMGRID
1952Jul66.3°F66.3°F+0.0°NCLIMGRID
1952Aug64.8°F66.7°F-2.0°NCLIMGRID
1952Sep65.9°F65.7°F+0.2°NCLIMGRID
1952Oct60.5°F60.7°F-0.1°NCLIMGRID
1952Nov50.9°F53.1°F-2.2°NCLIMGRID
1952Dec48.5°F47.8°F+0.7°NCLIMGRID
1953Jan51.1°F47.8°F+3.3°NCLIMGRID
1953Feb48.7°F50.3°F-1.6°NCLIMGRID
1953Mar49.7°F52.0°F-2.2°NCLIMGRID
1953Apr52.1°F54.3°F-2.2°NCLIMGRID
1953May55.7°F58.8°F-3.1°NCLIMGRID
1953Jun59.5°F63.0°F-3.5°NCLIMGRID
1953Jul65.8°F66.3°F-0.5°NCLIMGRID
1953Aug64.5°F66.7°F-2.3°NCLIMGRID
1953Sep66.4°F65.7°F+0.7°NCLIMGRID
1953Oct59.1°F60.7°F-1.5°NCLIMGRID
1953Nov54.3°F53.1°F+1.2°NCLIMGRID
1953Dec49.6°F47.8°F+1.8°NCLIMGRID
1954Jan47.8°F47.8°F-0.1°NCLIMGRID
1954Feb50.0°F50.3°F-0.3°NCLIMGRID
1954Mar48.5°F52.0°F-3.4°NCLIMGRID
1954Apr56.2°F54.3°F+1.9°NCLIMGRID
1954May58.0°F58.8°F-0.7°NCLIMGRID
1954Jun61.1°F63.0°F-1.9°NCLIMGRID
1954Jul66.2°F66.3°F-0.1°NCLIMGRID
1954Aug63.4°F66.7°F-3.3°NCLIMGRID
1954Sep63.7°F65.7°F-2.0°NCLIMGRID
1954Oct59.4°F60.7°F-1.2°NCLIMGRID
1954Nov53.5°F53.1°F+0.4°NCLIMGRID
1954Dec47.2°F47.8°F-0.6°NCLIMGRID
1955Jan44.2°F47.8°F-3.6°NCLIMGRID
1955Feb47.1°F50.3°F-3.2°NCLIMGRID
1955Mar50.8°F52.0°F-1.1°NCLIMGRID
1955Apr49.6°F54.3°F-4.7°NCLIMGRID
1955May57.7°F58.8°F-1.0°NCLIMGRID
1955Jun60.7°F63.0°F-2.4°NCLIMGRID
1955Jul62.7°F66.3°F-3.6°NCLIMGRID
1955Aug63.9°F66.7°F-2.8°NCLIMGRID
1955Sep63.6°F65.7°F-2.1°NCLIMGRID
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1984Mar55.0°F52.0°F+3.0°NCLIMGRID
1984Apr53.2°F54.3°F-1.0°NCLIMGRID
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1985Apr57.7°F54.3°F+3.4°NCLIMGRID
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1986Dec48.4°F47.8°F+0.5°NCLIMGRID
1987Jan47.1°F47.8°F-0.7°NCLIMGRID
1987Feb51.0°F50.3°F+0.8°NCLIMGRID
1987Mar52.7°F52.0°F+0.7°NCLIMGRID
1987Apr58.5°F54.3°F+4.2°NCLIMGRID
1987May61.5°F58.8°F+2.7°NCLIMGRID
1987Jun63.4°F63.0°F+0.3°NCLIMGRID
1987Jul64.4°F66.3°F-2.0°NCLIMGRID
1987Aug67.0°F66.7°F+0.3°NCLIMGRID
1987Sep65.7°F65.7°F+0.0°NCLIMGRID
1987Oct63.6°F60.7°F+2.9°NCLIMGRID
1987Nov54.0°F53.1°F+0.8°NCLIMGRID
1987Dec48.5°F47.8°F+0.6°NCLIMGRID
1988Jan49.2°F47.8°F+1.4°NCLIMGRID
1988Feb52.2°F50.3°F+1.9°NCLIMGRID
1988Mar54.3°F52.0°F+2.3°NCLIMGRID
1988Apr56.4°F54.3°F+2.2°NCLIMGRID
1988May58.2°F58.8°F-0.6°NCLIMGRID
1988Jun63.2°F63.0°F+0.2°NCLIMGRID
1988Jul69.0°F66.3°F+2.6°NCLIMGRID
1988Aug67.6°F66.7°F+0.8°NCLIMGRID
1988Sep64.7°F65.7°F-1.1°NCLIMGRID
1988Oct61.7°F60.7°F+1.0°NCLIMGRID
1988Nov53.9°F53.1°F+0.8°NCLIMGRID
1988Dec47.7°F47.8°F-0.1°NCLIMGRID
1989Jan46.3°F47.8°F-1.5°NCLIMGRID
1989Feb46.2°F50.3°F-4.0°NCLIMGRID
1989Mar53.8°F52.0°F+1.8°NCLIMGRID
1989Apr59.1°F54.3°F+4.8°NCLIMGRID
1989May59.2°F58.8°F+0.4°NCLIMGRID
1989Jun64.1°F63.0°F+1.1°NCLIMGRID
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1989Aug66.7°F66.7°F+0.0°NCLIMGRID
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1989Nov54.2°F53.1°F+1.1°NCLIMGRID
1989Dec48.1°F47.8°F+0.3°NCLIMGRID
1990Jan48.2°F47.8°F+0.4°NCLIMGRID
1990Feb46.8°F50.3°F-3.5°NCLIMGRID
1990Mar52.5°F52.0°F+0.5°NCLIMGRID
1990Apr57.8°F54.3°F+3.6°NCLIMGRID
1990May59.5°F58.8°F+0.8°NCLIMGRID
1990Jun63.8°F63.0°F+0.8°NCLIMGRID
1990Jul67.8°F66.3°F+1.5°NCLIMGRID
1990Aug69.0°F66.7°F+2.2°NCLIMGRID
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1990Nov53.1°F53.1°F-0.1°NCLIMGRID
1990Dec43.1°F47.8°F-4.7°NCLIMGRID
1991Jan47.9°F47.8°F+0.1°NCLIMGRID
1991Feb53.2°F50.3°F+2.9°NCLIMGRID
1991Mar49.4°F52.0°F-2.5°NCLIMGRID
1991Apr53.6°F54.3°F-0.6°NCLIMGRID
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1992Mar54.6°F52.0°F+2.6°NCLIMGRID
1992Apr58.9°F54.3°F+4.6°NCLIMGRID
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1995Jan51.4°F47.8°F+3.5°NCLIMGRID
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1995Apr54.4°F54.3°F+0.2°NCLIMGRID
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1997Feb51.1°F50.3°F+0.8°NCLIMGRID
1997Mar54.9°F52.0°F+2.9°NCLIMGRID
1997Apr57.1°F54.3°F+2.8°NCLIMGRID
1997May64.1°F58.8°F+5.3°NCLIMGRID
1997Jun64.1°F63.0°F+1.0°NCLIMGRID
1997Jul67.9°F66.3°F+1.6°NCLIMGRID
1997Aug68.6°F66.7°F+1.8°NCLIMGRID
1997Sep69.0°F65.7°F+3.3°NCLIMGRID
1997Oct60.8°F60.7°F+0.1°NCLIMGRID
1997Nov55.4°F53.1°F+2.3°NCLIMGRID
1997Dec48.3°F47.8°F+0.5°NCLIMGRID
1998Jan51.7°F47.8°F+3.8°NCLIMGRID
1998Feb49.7°F50.3°F-0.5°NCLIMGRID
1998Mar52.9°F52.0°F+1.0°NCLIMGRID
1998Apr53.8°F54.3°F-0.5°NCLIMGRID
1998May55.9°F58.8°F-2.8°NCLIMGRID
1998Jun62.2°F63.0°F-0.9°NCLIMGRID
1998Jul66.9°F66.3°F+0.5°NCLIMGRID
1998Aug69.4°F66.7°F+2.6°NCLIMGRID
1998Sep66.6°F65.7°F+0.9°NCLIMGRID
1998Oct59.0°F60.7°F-1.7°NCLIMGRID
1998Nov52.3°F53.1°F-0.9°NCLIMGRID
1998Dec45.0°F47.8°F-2.9°NCLIMGRID
1999Jan48.4°F47.8°F+0.5°NCLIMGRID
1999Feb48.0°F50.3°F-2.3°NCLIMGRID
1999Mar48.9°F52.0°F-3.0°NCLIMGRID
1999Apr53.6°F54.3°F-0.6°NCLIMGRID
1999May55.8°F58.8°F-2.9°NCLIMGRID
1999Jun61.6°F63.0°F-1.4°NCLIMGRID
1999Jul65.5°F66.3°F-0.9°NCLIMGRID
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1999Dec49.4°F47.8°F+1.5°NCLIMGRID
2000Jan49.8°F47.8°F+2.0°NCLIMGRID
2000Feb51.4°F50.3°F+1.1°NCLIMGRID
2000Mar53.0°F52.0°F+1.0°NCLIMGRID
2000Apr56.8°F54.3°F+2.5°NCLIMGRID
2000May60.6°F58.8°F+1.8°NCLIMGRID
2000Jun65.6°F63.0°F+2.5°NCLIMGRID
2000Jul65.0°F66.3°F-1.3°NCLIMGRID
2000Aug67.3°F66.7°F+0.5°NCLIMGRID
2000Sep67.2°F65.7°F+1.5°NCLIMGRID
2000Oct59.4°F60.7°F-1.2°NCLIMGRID
2000Nov50.1°F53.1°F-3.1°NCLIMGRID
2000Dec50.2°F47.8°F+2.4°NCLIMGRID
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2001Mar54.7°F52.0°F+2.7°NCLIMGRID
2001Apr52.1°F54.3°F-2.1°NCLIMGRID
2001May64.0°F58.8°F+5.2°NCLIMGRID
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2001Dec49.1°F47.8°F+1.2°NCLIMGRID
2002Jan46.4°F47.8°F-1.4°NCLIMGRID
2002Feb51.5°F50.3°F+1.2°NCLIMGRID
2002Mar51.5°F52.0°F-0.4°NCLIMGRID
2002Apr55.3°F54.3°F+1.0°NCLIMGRID
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2002Jun63.1°F63.0°F+0.0°NCLIMGRID
2002Jul67.1°F66.3°F+0.8°NCLIMGRID
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2002Oct60.5°F60.7°F-0.1°NCLIMGRID
2002Nov55.9°F53.1°F+2.8°NCLIMGRID
2002Dec49.9°F47.8°F+2.0°NCLIMGRID
2003Jan53.6°F47.8°F+5.8°NCLIMGRID
2003Feb49.8°F50.3°F-0.5°NCLIMGRID
2003Mar53.7°F52.0°F+1.7°NCLIMGRID
2003Apr52.0°F54.3°F-2.3°NCLIMGRID
2003May59.5°F58.8°F+0.7°NCLIMGRID
2003Jun64.6°F63.0°F+1.6°NCLIMGRID
2003Jul68.8°F66.3°F+2.5°NCLIMGRID
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2003Sep68.6°F65.7°F+2.9°NCLIMGRID
2003Oct63.9°F60.7°F+3.2°NCLIMGRID
2003Nov51.4°F53.1°F-1.7°NCLIMGRID
2003Dec50.0°F47.8°F+2.2°NCLIMGRID
2004Jan48.3°F47.8°F+0.5°NCLIMGRID
2004Feb49.6°F50.3°F-0.6°NCLIMGRID
2004Mar58.6°F52.0°F+6.6°NCLIMGRID
2004Apr58.0°F54.3°F+3.8°NCLIMGRID
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2004Nov52.3°F53.1°F-0.9°NCLIMGRID
2004Dec49.6°F47.8°F+1.7°NCLIMGRID
2005Jan48.1°F47.8°F+0.2°NCLIMGRID
2005Feb52.2°F50.3°F+1.9°NCLIMGRID
2005Mar55.2°F52.0°F+3.3°NCLIMGRID
2005Apr54.5°F54.3°F+0.2°NCLIMGRID
2005May60.3°F58.8°F+1.5°NCLIMGRID
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2005Aug67.7°F66.7°F+1.0°NCLIMGRID
2005Sep63.6°F65.7°F-2.1°NCLIMGRID
2005Oct60.9°F60.7°F+0.3°NCLIMGRID
2005Nov55.7°F53.1°F+2.5°NCLIMGRID
2005Dec51.7°F47.8°F+3.8°NCLIMGRID
2006Jan50.0°F47.8°F+2.2°NCLIMGRID
2006Feb51.2°F50.3°F+0.9°NCLIMGRID
2006Mar48.7°F52.0°F-3.2°NCLIMGRID
2006Apr54.1°F54.3°F-0.2°NCLIMGRID
2006May60.7°F58.8°F+1.9°NCLIMGRID
2006Jun65.7°F63.0°F+2.7°NCLIMGRID
2006Jul71.0°F66.3°F+4.7°NCLIMGRID
2006Aug66.6°F66.7°F-0.2°NCLIMGRID
2006Sep64.9°F65.7°F-0.9°NCLIMGRID
2006Oct59.9°F60.7°F-0.8°NCLIMGRID
2006Nov53.4°F53.1°F+0.3°NCLIMGRID
2006Dec48.4°F47.8°F+0.6°NCLIMGRID
2007Jan46.5°F47.8°F-1.3°NCLIMGRID
2007Feb50.2°F50.3°F-0.1°NCLIMGRID
2007Mar55.0°F52.0°F+3.1°NCLIMGRID
2007Apr55.2°F54.3°F+1.0°NCLIMGRID
2007May59.6°F58.8°F+0.8°NCLIMGRID
2007Jun63.3°F63.0°F+0.3°NCLIMGRID
2007Jul67.4°F66.3°F+1.1°NCLIMGRID
2007Aug68.0°F66.7°F+1.3°NCLIMGRID
2007Sep65.2°F65.7°F-0.5°NCLIMGRID
2007Oct59.3°F60.7°F-1.4°NCLIMGRID
2007Nov54.5°F53.1°F+1.4°NCLIMGRID
2007Dec46.7°F47.8°F-1.1°NCLIMGRID
2008Jan46.4°F47.8°F-1.4°NCLIMGRID
2008Feb49.8°F50.3°F-0.5°NCLIMGRID
2008Mar52.2°F52.0°F+0.3°NCLIMGRID
2008Apr54.2°F54.3°F+0.0°NCLIMGRID
2008May59.8°F58.8°F+1.0°NCLIMGRID
2008Jun64.7°F63.0°F+1.7°NCLIMGRID
2008Jul67.7°F66.3°F+1.4°NCLIMGRID
2008Aug68.5°F66.7°F+1.8°NCLIMGRID
2008Sep67.5°F65.7°F+1.8°NCLIMGRID
2008Oct62.7°F60.7°F+2.1°NCLIMGRID
2008Nov55.9°F53.1°F+2.8°NCLIMGRID
2008Dec46.2°F47.8°F-1.6°NCLIMGRID
2009Jan50.7°F47.8°F+2.9°NCLIMGRID
2009Feb49.8°F50.3°F-0.5°NCLIMGRID
2009Mar52.0°F52.0°F+0.0°NCLIMGRID
2009Apr55.5°F54.3°F+1.2°NCLIMGRID
2009May61.1°F58.8°F+2.4°NCLIMGRID
2009Jun63.7°F63.0°F+0.7°NCLIMGRID
2009Jul66.8°F66.3°F+0.5°NCLIMGRID
2009Aug68.5°F66.7°F+1.8°NCLIMGRID
2009Sep68.6°F65.7°F+2.9°NCLIMGRID
2009Oct60.7°F60.7°F+0.1°NCLIMGRID
2009Nov53.2°F53.1°F+0.1°NCLIMGRID
2009Dec47.6°F47.8°F-0.3°NCLIMGRID
2010Jan49.5°F47.8°F+1.6°NCLIMGRID
2010Feb51.2°F50.3°F+0.9°NCLIMGRID
2010Mar52.4°F52.0°F+0.4°NCLIMGRID
2010Apr52.5°F54.3°F-1.8°NCLIMGRID
2010May56.2°F58.8°F-2.5°NCLIMGRID
2010Jun63.5°F63.0°F+0.4°NCLIMGRID
2010Jul65.6°F66.3°F-0.8°NCLIMGRID
2010Aug65.7°F66.7°F-1.1°NCLIMGRID
2010Sep67.1°F65.7°F+1.4°NCLIMGRID
2010Oct61.7°F60.7°F+1.0°NCLIMGRID
2010Nov53.0°F53.1°F-0.2°NCLIMGRID
2010Dec50.8°F47.8°F+2.9°NCLIMGRID
2011Jan49.7°F47.8°F+1.9°NCLIMGRID
2011Feb48.2°F50.3°F-2.1°NCLIMGRID
2011Mar51.9°F52.0°F-0.1°NCLIMGRID
2011Apr54.1°F54.3°F-0.1°NCLIMGRID
2011May56.5°F58.8°F-2.2°NCLIMGRID
2011Jun62.0°F63.0°F-1.0°NCLIMGRID
2011Jul66.6°F66.3°F+0.3°NCLIMGRID
2011Aug66.4°F66.7°F-0.3°NCLIMGRID
2011Sep67.4°F65.7°F+1.7°NCLIMGRID
2011Oct63.2°F60.7°F+2.5°NCLIMGRID
2011Nov52.0°F53.1°F-1.1°NCLIMGRID
2011Dec47.5°F47.8°F-0.4°NCLIMGRID
2012Jan49.6°F47.8°F+1.8°NCLIMGRID
2012Feb50.8°F50.3°F+0.5°NCLIMGRID
2012Mar51.2°F52.0°F-0.7°NCLIMGRID
2012Apr56.1°F54.3°F+1.8°NCLIMGRID
2012May59.7°F58.8°F+0.9°NCLIMGRID
2012Jun63.7°F63.0°F+0.7°NCLIMGRID
2012Jul66.2°F66.3°F-0.1°NCLIMGRID
2012Aug66.7°F66.7°F+0.0°NCLIMGRID
2012Sep63.7°F65.7°F-2.0°NCLIMGRID
2012Oct63.1°F60.7°F+2.4°NCLIMGRID
2012Nov55.9°F53.1°F+2.7°NCLIMGRID
2012Dec48.7°F47.8°F+0.9°NCLIMGRID
2013Jan46.7°F47.8°F-1.1°NCLIMGRID
2013Feb48.7°F50.3°F-1.6°NCLIMGRID
2013Mar54.4°F52.0°F+2.5°NCLIMGRID
2013Apr58.7°F54.3°F+4.4°NCLIMGRID
2013May61.4°F58.8°F+2.7°NCLIMGRID
2013Jun65.6°F63.0°F+2.6°NCLIMGRID
2013Jul67.7°F66.3°F+1.4°NCLIMGRID
2013Aug68.0°F66.7°F+1.2°NCLIMGRID
2013Sep66.9°F65.7°F+1.2°NCLIMGRID
2013Oct59.9°F60.7°F-0.7°NCLIMGRID
2013Nov54.6°F53.1°F+1.5°NCLIMGRID
2013Dec47.6°F47.8°F-0.2°NCLIMGRID
2014Jan53.2°F47.8°F+5.4°NCLIMGRID
2014Feb52.2°F50.3°F+1.9°NCLIMGRID
2014Mar56.6°F52.0°F+4.6°NCLIMGRID
2014Apr57.6°F54.3°F+3.3°NCLIMGRID
2014May62.8°F58.8°F+4.0°NCLIMGRID
2014Jun64.8°F63.0°F+1.7°NCLIMGRID
2014Jul69.2°F66.3°F+2.8°NCLIMGRID
2014Aug68.9°F66.7°F+2.2°NCLIMGRID
2014Sep67.8°F65.7°F+2.1°NCLIMGRID
2014Oct64.9°F60.7°F+4.2°NCLIMGRID
2014Nov56.5°F53.1°F+3.4°NCLIMGRID
2014Dec53.8°F47.8°F+6.0°NCLIMGRID
2015Jan51.9°F47.8°F+4.1°NCLIMGRID
2015Feb55.8°F50.3°F+5.5°NCLIMGRID
2015Mar58.1°F52.0°F+6.1°NCLIMGRID
2015Apr56.8°F54.3°F+2.5°NCLIMGRID
2015May58.2°F58.8°F-0.5°NCLIMGRID
2015Jun65.6°F63.0°F+2.6°NCLIMGRID
2015Jul70.1°F66.3°F+3.7°NCLIMGRID
2015Aug70.8°F66.7°F+4.1°NCLIMGRID
2015Sep69.9°F65.7°F+4.2°NCLIMGRID
2015Oct66.1°F60.7°F+5.4°NCLIMGRID
2015Nov51.4°F53.1°F-1.8°NCLIMGRID
2015Dec47.6°F47.8°F-0.3°NCLIMGRID
2016Jan50.8°F47.8°F+3.0°NCLIMGRID
2016Feb55.5°F50.3°F+5.2°NCLIMGRID
2016Mar55.1°F52.0°F+3.1°NCLIMGRID
2016Apr58.6°F54.3°F+4.3°NCLIMGRID
2016May61.4°F58.8°F+2.7°NCLIMGRID
2016Jun66.5°F63.0°F+3.4°NCLIMGRID
2016Jul67.2°F66.3°F+0.9°NCLIMGRID
2016Aug67.2°F66.7°F+0.5°NCLIMGRID
2016Sep67.0°F65.7°F+1.3°NCLIMGRID
2016Oct61.2°F60.7°F+0.6°NCLIMGRID
2016Nov55.6°F53.1°F+2.4°NCLIMGRID
2016Dec48.1°F47.8°F+0.2°NCLIMGRID
2017Jan47.5°F47.8°F-0.3°NCLIMGRID
2017Feb51.6°F50.3°F+1.3°NCLIMGRID
2017Mar55.2°F52.0°F+3.2°NCLIMGRID
2017Apr56.4°F54.3°F+2.1°NCLIMGRID
2017May61.4°F58.8°F+2.7°NCLIMGRID
2017Jun65.4°F63.0°F+2.3°NCLIMGRID
2017Jul68.5°F66.3°F+2.2°NCLIMGRID
2017Aug69.3°F66.7°F+2.5°NCLIMGRID
2017Sep70.9°F65.7°F+5.2°NCLIMGRID
2017Oct63.4°F60.7°F+2.7°NCLIMGRID
2017Nov55.3°F53.1°F+2.1°NCLIMGRID
2017Dec50.2°F47.8°F+2.4°NCLIMGRID
2018Jan51.6°F47.8°F+3.8°NCLIMGRID
2018Feb51.7°F50.3°F+1.4°NCLIMGRID
2018Mar52.4°F52.0°F+0.4°NCLIMGRID
2018Apr56.1°F54.3°F+1.8°NCLIMGRID
2018May59.3°F58.8°F+0.5°NCLIMGRID
2018Jun64.6°F63.0°F+1.6°NCLIMGRID
2018Jul69.4°F66.3°F+3.1°NCLIMGRID
2018Aug67.5°F66.7°F+0.8°NCLIMGRID
2018Sep64.6°F65.7°F-1.1°NCLIMGRID
2018Oct62.4°F60.7°F+1.8°NCLIMGRID
2018Nov56.1°F53.1°F+2.9°NCLIMGRID
2018Dec50.3°F47.8°F+2.4°NCLIMGRID
2019Jan51.6°F47.8°F+3.8°NCLIMGRID
2019Feb46.7°F50.3°F-3.5°NCLIMGRID
2019Mar52.3°F52.0°F+0.3°NCLIMGRID
2019Apr58.6°F54.3°F+4.4°NCLIMGRID
2019May58.7°F58.8°F+0.0°NCLIMGRID
2019Jun67.2°F63.0°F+4.1°NCLIMGRID
2019Jul68.3°F66.3°F+1.9°NCLIMGRID
2019Aug70.9°F66.7°F+4.1°NCLIMGRID
2019Sep68.6°F65.7°F+2.9°NCLIMGRID
2019Oct62.7°F60.7°F+2.0°NCLIMGRID
2019Nov54.6°F53.1°F+1.5°NCLIMGRID
2019Dec50.4°F47.8°F+2.6°NCLIMGRID
2020Jan49.2°F47.8°F+1.4°NCLIMGRID
2020Feb53.4°F50.3°F+3.1°NCLIMGRID
2020Mar52.6°F52.0°F+0.7°NCLIMGRID
2020Apr57.0°F54.3°F+2.7°NCLIMGRID
2020May62.8°F58.8°F+4.1°NCLIMGRID
2020Jun66.6°F63.0°F+3.5°NCLIMGRID
2020Jul68.0°F66.3°F+1.7°NCLIMGRID
2020Aug72.1°F66.7°F+5.3°NCLIMGRID
2020Sep71.0°F65.7°F+5.3°NCLIMGRID
2020Oct67.3°F60.7°F+6.6°NCLIMGRID
2020Nov53.7°F53.1°F+0.6°NCLIMGRID
2020Dec50.3°F47.8°F+2.5°NCLIMGRID
2021Jan50.5°F47.8°F+2.7°NCLIMGRID
2021Feb51.2°F50.3°F+0.9°NCLIMGRID
2021Mar51.2°F52.0°F-0.7°NCLIMGRID
2021Apr55.6°F54.3°F+1.4°NCLIMGRID
2021May60.2°F58.8°F+1.4°NCLIMGRID
2021Jun66.2°F63.0°F+3.1°NCLIMGRID
2021Jul68.3°F66.3°F+2.0°NCLIMGRID
2021Aug69.5°F66.7°F+2.8°NCLIMGRID
2021Sep68.2°F65.7°F+2.5°NCLIMGRID
2021Oct61.1°F60.7°F+0.4°NCLIMGRID
2021Nov57.3°F53.1°F+4.2°NCLIMGRID
2021Dec48.1°F47.8°F+0.2°NCLIMGRID
2022Jan50.6°F47.8°F+2.8°NCLIMGRID
2022Feb51.0°F50.3°F+0.7°NCLIMGRID
2022Mar53.8°F52.0°F+1.8°NCLIMGRID
2022Apr55.6°F54.3°F+1.3°NCLIMGRID
2022May59.7°F58.8°F+0.9°NCLIMGRID
2022Jun65.8°F63.0°F+2.7°NCLIMGRID
2022Jul66.7°F66.3°F+0.3°NCLIMGRID
2022Aug69.6°F66.7°F+2.9°NCLIMGRID
2022Sep70.0°F65.7°F+4.3°NCLIMGRID
2022Oct61.7°F60.7°F+1.1°NCLIMGRID
2022Nov50.7°F53.1°F-2.4°NCLIMGRID
2022Dec48.1°F47.8°F+0.2°NCLIMGRID
2023Jan49.0°F47.8°F+1.2°NCLIMGRID
2023Feb47.2°F50.3°F-3.1°NCLIMGRID
2023Mar49.0°F52.0°F-2.9°NCLIMGRID
2023Apr55.4°F54.3°F+1.1°NCLIMGRID
2023May59.5°F58.8°F+0.7°NCLIMGRID
2023Jun63.0°F63.0°F+0.0°NCLIMGRID
2023Jul68.6°F66.3°F+2.2°NCLIMGRID
2023Aug71.0°F66.7°F+4.2°NCLIMGRID
2023Sep65.7°F65.7°F+0.0°NCLIMGRID
2023Oct64.0°F60.7°F+3.3°NCLIMGRID
2023Nov56.8°F53.1°F+3.7°NCLIMGRID
2023Dec52.4°F47.8°F+4.5°NCLIMGRID
2024Jan51.7°F47.8°F+3.9°NCLIMGRID
2024Feb51.7°F50.3°F+1.4°NCLIMGRID
2024Mar53.5°F52.0°F+1.6°NCLIMGRID
2024Apr56.9°F54.3°F+2.6°NCLIMGRID
2024May60.8°F58.8°F+2.0°NCLIMGRID
2024Jun65.7°F63.0°F+2.7°NCLIMGRID
2024Jul71.6°F66.3°F+5.3°NCLIMGRID
2024Aug69.1°F66.7°F+2.3°NCLIMGRID
2024Sep68.0°F65.7°F+2.3°NCLIMGRID
2024Oct66.8°F60.7°F+6.2°NCLIMGRID
2024Nov53.2°F53.1°F+0.0°NCLIMGRID
2024Dec53.0°F47.8°F+5.1°NCLIMGRID
2025Jan48.8°F47.8°F+0.9°NCLIMGRID
2025Feb50.5°F50.3°F+0.3°NCLIMGRID
2025Mar52.3°F52.0°F+0.3°NCLIMGRID
2025Apr54.9°F54.3°F+0.6°NCLIMGRID
2025May60.2°F58.8°F+1.5°NCLIMGRID
2025Jun62.6°F63.0°F-0.5°NCLIMGRID
2025Jul66.4°F66.3°F+0.0°NCLIMGRID
2025Aug69.9°F66.7°F+3.1°NCLIMGRID
2025Sep69.0°F65.7°F+3.3°NCLIMGRID
2025Oct61.2°F60.7°F+0.5°NCLIMGRID
2025Nov56.4°F53.1°F+3.2°NCLIMGRID
2025Dec52.2°F47.8°F+4.3°NCLIMGRID
2026Jan53.1°F47.8°F+5.3°NCLIMGRID
2026Feb53.7°F50.3°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
January47.8°F26/26
February50.3°F26/26
March52.0°F26/26
April54.3°F26/26
May58.8°F26/26
June63.0°F26/26
July66.3°F26/26
August66.7°F26/26
September65.7°F26/26
October60.7°F26/26
November53.1°F26/26
December47.8°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 Los Altos, California getting warmer?

Based on 96+ years of NOAA temperature records, Los Altos has warmed at a rate of approximately 0.33°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 Los Altos?

The warmest year on record in Los Altos was 2014, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Los Altos 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 Los Altos's climate profile.

How are the climate visualizations for Los Altos created?

Three visualizations are generated from Los Altos'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 Los Altos's temperature data?

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

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