Climate Change in Hana, Hawaii

81+ years of recorded temperature data show Hana is warming.

Based on our analysis of 81 years of temperature data near Hana, HI, this area shows a warming trend of approximately +0.5°F per decade. 10 of the last 10 years recorded above-average temperatures, and 1943 was the warmest year on record at +16.7°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.5°F

per decade

Warmest Year

1943

+16.7°F anomaly

Recent Warm Years

10 / 10

above-average years

Decade Shift

+4.3°F

2020s vs 1940s

Compared to the National Average

Hana is warming 0.3°F/decade faster than the national average.

National: +0.20°F/decade
Hana: +0.50°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 Hana's long-term warming trend.

Temperature anomaly spiral for Hana, Hawaii
Climate spiral: monthly temperature anomalies from 81+ years of NOAA records for Hana, HI.

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 Hana, Hawaii
Warming stripes: each stripe is one year of average temperature anomaly for Hana, HI.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.50°F per decade quantifies the rate of change.

Temperature trend chart for Hana, Hawaii
Linear trend: annual temperature anomalies with trend line for Hana, HI.

Temperature by Decade

1940s
+6.63°F
1950s
-0.00°F
1960s
-0.06°F
1970s
-0.51°F
1980s
+0.27°F
1990s
+0.88°F
2000s
+2.46°F
2010s
+9.96°F
2020s
+13.23°F

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

Anomaly Scale

-2.3°F Colder Normal +17.1°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 Hana, HI. Filter by decade or download as CSV.

Data Sources & Audit

Station
HALEAKALA RANGER STATION 338, HI US
Distance
8.5 mi
Coverage
81.8%
Records
815
Range
1940-01 – 2022-04
Gap-filled
163 from 7 stations
Full Data Audit 978 records
YearMonthTempBaselineAnomalySourceGap
1940Jan68.8°F50.5°F+18.3°USC00511930
1940Feb70.2°F50.0°F+20.2°USC00511930
1940Mar68.7°F50.6°F+18.1°USC00511930
1940Apr71.1°F51.4°F+19.8°USC00511930
1940May66.4°F52.8°F+13.5°USC00511930
1940Jun58.7°F55.7°F+3.1°USC00511004
1940Jul66.0°F56.4°F+9.6°USC00511930
1940Aug68.4°F56.7°F+11.7°USC00511930
1940Sep68.0°F55.7°F+12.4°USC00511930
1940Oct68.2°F55.7°F+12.5°USC00511930
1940Nov66.6°F54.3°F+12.4°USC00511930
1940Dec65.1°F52.1°F+13.0°USC00511930
1941Jan64.3°F50.5°F+13.8°USC00511930
1941Feb62.3°F50.0°F+12.3°USC00511930
1941Mar61.8°F50.6°F+11.2°USC00511930
1941Apr68.6°F51.4°F+17.2°USC00511930
1941May64.5°F52.8°F+11.7°USC00511930
1941Jun71.7°F55.7°F+16.0°USC00511930
1941Jul67.8°F56.4°F+11.4°USC00511930
1941Aug73.8°F56.7°F+17.1°USC00511930
1941Sep72.7°F55.7°F+17.1°USC00511930
1941Oct72.4°F55.7°F+16.7°USC00511122
1941Nov64.8°F54.3°F+10.6°USC00511122
1941Dec67.6°F52.1°F+15.5°USC00511930
1942Jan67.7°F50.5°F+17.2°USC00511930
1942Feb51.0°F50.0°F+0.9°USC00511004
1942Mar49.5°F50.6°F-1.1°USC00511004
1942Apr66.8°F51.4°F+15.4°USC00511930
1942May70.9°F52.8°F+18.1°USC00511930
1942Jun57.0°F55.7°F+1.4°USC00511004
1942Jul72.6°F56.4°F+16.1°USC00511930
1942Aug73.1°F56.7°F+16.4°USC00511930
1942Sep57.9°F55.7°F+2.3°USC00511004
1942Oct73.2°F55.7°F+17.5°USC00511930
1942Nov74.2°F54.3°F+19.9°USC00511930
1942Dec53.2°F52.1°F+1.2°USC00511004
1943Jan70.8°F50.5°F+20.2°USC00511930
1943Feb65.8°F50.0°F+15.8°USC00511930
1943Mar64.9°F50.6°F+14.3°USC00511930
1943Apr69.2°F51.4°F+17.8°USC00511930
1943May70.8°F52.8°F+17.9°USC00511930
1943Jun72.2°F55.7°F+16.5°USC00511930
1943Jul72.4°F56.4°F+16.0°USC00511122
1943Aug72.2°F56.7°F+15.5°USC00511930
1943Sep72.3°F55.7°F+16.6°USC00511930
1943Oct72.7°F55.7°F+17.0°USC00511930
1943Nov70.2°F54.3°F+16.0°USC00511930
1943Dec68.5°F52.1°F+16.5°USC00511930
1944Jan54.1°F50.5°F+3.6°USC00511004
1944Feb49.3°F50.0°F-0.7°USC00511004
1944Mar50.7°F50.6°F+0.1°USC00511004
1944Apr52.7°F51.4°F+1.4°USC00511004
1944May52.3°F52.8°F-0.6°USC00511004
1944Jun54.6°F55.7°F-1.1°USC00511004
1944Jul56.5°F56.4°F+0.0°USC00511004
1944Aug57.4°F56.7°F+0.7°USC00511004
1944Sep53.0°F55.7°F-2.7°USC00511004
1944Oct70.7°F55.7°F+15.1°USC00511930
1944Nov53.0°F54.3°F-1.3°USC00511004
1944Dec50.9°F52.1°F-1.1°USC00511004
1945Jan52.9°F50.5°F+2.4°USC00511004
1945Feb68.2°F50.0°F+18.2°USC00511930
1945Mar52.6°F50.6°F+2.0°USC00511004
1945Apr52.0°F51.4°F+0.6°USC00511004
1945May53.6°F52.8°F+0.8°USC00511004
1945Jun69.5°F55.7°F+13.8°USC00511930
1945Jul57.2°F56.4°F+0.7°USC00511004
1945Aug56.3°F56.7°F-0.4°USC00511004
1945Sep54.7°F55.7°F-1.0°USC00511004
1945Oct53.3°F55.7°F-2.3°USC00511004
1945Nov53.7°F54.3°F-0.6°USC00511004
1945Dec54.2°F52.1°F+2.2°USC00511004
1946Jan52.6°F50.5°F+2.1°USC00511004
1946Feb51.9°F50.0°F+1.8°USC00511004
1946Mar51.1°F50.6°F+0.5°USC00511004
1946Apr50.6°F51.4°F-0.7°USC00511004
1946May52.8°F52.8°F+0.0°USC00511004
1946Jun56.2°F55.7°F+0.6°USC00511004
1946Jul58.5°F56.4°F+2.1°USC00511004
1946Aug61.4°F56.7°F+4.6°USC00511004
1946Sep54.4°F55.7°F-1.2°USC00511004
1946Oct71.5°F55.7°F+15.8°USC00517194
1946Nov69.3°F54.3°F+15.1°USC00517194
1946Dec67.3°F52.1°F+15.2°USC00517194
1947Jan49.6°F50.5°F-1.0°USC00511004
1947Feb64.3°F50.0°F+14.2°USC00517194
1947Mar50.4°F50.6°F-0.3°USC00511004
1947Apr54.1°F51.4°F+2.7°USC00511004
1947May52.4°F52.8°F-0.5°USC00511004
1947Jun59.0°F55.7°F+3.3°USC00511004
1947Jul71.8°F56.4°F+15.3°USC00517194
1947Aug56.7°F56.7°F-0.1°USC00511004
1947Sep57.3°F55.7°F+1.6°USC00511004
1947Oct57.1°F55.7°F+1.4°USC00511004
1947Nov53.2°F54.3°F-1.1°USC00511004
1947Dec50.6°F52.1°F-1.4°USC00511004
1948Jan48.4°F50.5°F-2.1°USC00511004
1948Feb48.3°F50.0°F-1.7°USC00511004
1948Mar48.9°F50.6°F-1.7°USC00511004
1948Apr51.3°F51.4°F+0.0°USC00511004
1948May53.8°F52.8°F+1.0°USC00511004
1948Jun55.4°F55.7°F-0.3°USC00511004
1948Jul55.7°F56.4°F-0.8°USC00511004
1948Aug57.8°F56.7°F+1.1°USC00511004
1948Sep54.5°F55.7°F-1.2°USC00511004
1948Oct53.2°F55.7°F-2.5°USC00511004
1948Nov52.7°F54.3°F-1.5°USC00511004
1948Dec47.9°F52.1°F-4.2°USC00511004
1949Jan48.6°F50.5°F-1.9°USC00511004
1949Feb50.4°F50.0°F+0.3°USC00511004
1949Mar48.7°F50.6°F-1.9°USC00511004
1949Apr66.0°F51.4°F+14.6°USC00517194
1949May55.9°F52.8°F+3.1°USC00511004
1949Jun55.8°F55.7°F+0.1°USC00511004
1949Jul55.3°F56.4°F-1.1°USC00511004
1949Aug58.5°F56.7°F+1.7°USC00511004
1949Sep55.0°F55.7°F-0.7°USC00511004
1949Oct54.3°F55.7°F-1.4°USC00511004
1949Nov51.9°F54.3°F-2.4°USC00511004
1949Dec50.8°F52.1°F-1.2°USC00511004
1950Jan50.5°F50.5°F+0.0°USC00511004
1950Feb53.3°F50.0°F+3.3°USC00511004
1950Mar51.7°F50.6°F+1.1°USC00511004
1950Apr51.1°F51.4°F-0.3°USC00511004
1950May52.3°F52.8°F-0.6°USC00511004
1950Jun54.1°F55.7°F-1.6°USC00511004
1950Jul56.5°F56.4°F+0.1°USC00511004
1950Aug55.8°F56.7°F-0.9°USC00511004
1950Sep55.3°F55.7°F-0.3°USC00511004
1950Oct55.2°F55.7°F-0.5°USC00511004
1950Nov51.8°F54.3°F-2.5°USC00511004
1950Dec50.6°F52.1°F-1.5°USC00511004
1951Jan50.4°F50.5°F-0.1°USC00511004
1951Feb50.8°F50.0°F+0.8°USC00511004
1951Mar50.6°F50.6°F+0.0°USC00511004
1951Apr52.3°F51.4°F+0.9°USC00511004
1951May52.2°F52.8°F-0.7°USC00511004
1951Jun54.2°F55.7°F-1.4°USC00511004
1951Jul57.2°F56.4°F+0.8°USC00511004
1951Aug55.6°F56.7°F-1.1°USC00511004
1951Sep56.8°F55.7°F+1.1°USC00511004
1951Oct55.9°F55.7°F+0.3°USC00511004
1951Nov53.5°F54.3°F-0.8°USC00511004
1951Dec53.7°F52.1°F+1.6°USC00511004
1952Jan51.6°F50.5°F+1.1°USC00511004
1952Feb49.4°F50.0°F-0.6°USC00511004
1952Mar49.5°F50.6°F-1.1°USC00511004
1952Apr50.4°F51.4°F-0.9°USC00511004
1952May50.8°F52.8°F-2.1°USC00511004
1952Jun56.4°F55.7°F+0.8°USC00511004
1952Jul56.3°F56.4°F-0.2°USC00511004
1952Aug56.1°F56.7°F-0.6°USC00511004
1952Sep52.3°F55.7°F-3.4°USC00511004
1952Oct54.4°F55.7°F-1.3°USC00511004
1952Nov52.6°F54.3°F-1.7°USC00511004
1952Dec53.0°F52.1°F+1.0°USC00511004
1953Jan51.5°F50.5°F+1.0°USC00511004
1953Feb50.7°F50.0°F+0.7°USC00511004
1953Mar49.2°F50.6°F-1.4°USC00511004
1953Apr52.9°F51.4°F+1.6°USC00511004
1953May54.5°F52.8°F+1.7°USC00511004
1953Jun57.2°F55.7°F+1.5°USC00511004
1953Jul60.6°F56.4°F+4.1°USC00511004
1953Aug58.5°F56.7°F+1.8°USC00511004
1953Sep54.5°F55.7°F-1.1°USC00511004
1953Oct55.7°F55.7°F+0.1°USC00511004
1953Nov55.4°F54.3°F+1.2°USC00511004
1953Dec53.4°F52.1°F+1.3°USC00511004
1954Jan50.5°F50.5°F+0.0°USC00511004
1954Feb52.8°F50.0°F+2.8°USC00511004
1954Mar47.5°F50.6°F-3.2°USC00511004
1954Apr53.9°F51.4°F+2.6°USC00511004
1954May53.2°F52.8°F+0.3°USC00511004
1954Jun59.1°F55.7°F+3.4°USC00511004
1954Jul54.9°F56.4°F-1.5°USC00511004
1954Aug58.4°F56.7°F+1.7°USC00511004
1954Sep54.6°F55.7°F-1.0°USC00511004
1954Oct54.8°F55.7°F-0.8°USC00511004
1954Nov56.6°F54.3°F+2.4°USC00511004
1954Dec48.7°F52.1°F-3.4°USC00511004
1955Jan50.9°F50.5°F+0.4°USC00511004
1955Feb48.6°F50.0°F-1.4°USC00511004
1955Mar46.3°F50.6°F-4.3°USC00511004
1955Apr50.6°F51.4°F-0.8°USC00511004
1955May53.3°F52.8°F+0.5°USC00511004
1955Jun56.5°F55.7°F+0.8°USC00511004
1955Jul53.5°F56.4°F-3.0°USC00511004
1955Aug52.4°F56.7°F-4.3°USC00511004
1955Sep52.3°F55.7°F-3.4°USC00511004
1955Oct53.5°F55.7°F-2.2°USC00511004
1955Nov53.5°F54.3°F-0.8°USC00511004
1955Dec53.3°F52.1°F+1.3°USC00511004
1956Jan51.5°F50.5°F+1.0°USC00511004
1956Feb47.3°F50.0°F-2.7°USC00511004
1956Mar51.2°F50.6°F+0.5°USC00511004
1956Apr50.4°F51.4°F-1.0°USC00511004
1956May52.2°F52.8°F-0.7°USC00511004
1956Jun53.5°F55.7°F-2.1°USC00511004
1956Jul54.7°F56.4°F-1.7°USC00511004
1956Aug57.3°F56.7°F+0.6°USC00511004
1956Sep55.0°F55.7°F-0.7°USC00511004
1956Oct53.9°F55.7°F-1.8°USC00511004
1956Nov52.8°F54.3°F-1.5°USC00511004
1956Dec52.2°F52.1°F+0.2°USC00511004
1957Jan50.1°F50.5°F-0.4°USC00511004
1957Feb45.8°F50.0°F-4.2°USC00511004
1957Mar48.8°F50.6°F-1.9°USC00511004
1957Apr49.5°F51.4°F-1.9°USC00511004
1957May65.1°F52.8°F+12.2°USC00517194
1957Jun56.3°F55.7°F+0.7°USC00511004
1957Jul56.5°F56.4°F+0.1°USC00511004
1957Aug57.0°F56.7°F+0.3°USC00511004
1957Sep57.5°F55.7°F+1.8°USC00511004
1957Oct55.5°F55.7°F-0.2°USC00511004
1957Nov54.1°F54.3°F-0.1°USC00511004
1957Dec51.7°F52.1°F-0.4°USC00511004
1958Jan50.5°F50.5°F+0.0°USC00511004
1958Feb50.4°F50.0°F+0.4°USC00511004
1958Mar47.6°F50.6°F-3.0°USC00511004
1958Apr52.4°F51.4°F+1.0°USC00511004
1958May54.8°F52.8°F+2.0°USC00511004
1958Jun56.8°F55.7°F+1.1°USC00511004
1958Jul55.3°F56.4°F-1.1°USC00511004
1958Aug58.5°F56.7°F+1.8°USC00511004
1958Sep56.1°F55.7°F+0.4°USC00511004
1958Oct54.3°F55.7°F-1.4°USC00511004
1958Nov53.7°F54.3°F-0.6°USC00511004
1958Dec50.9°F52.1°F-1.2°USC00511004
1959Jan50.8°F50.5°F+0.2°USC00511004
1959Feb49.6°F50.0°F-0.4°USC00511004
1959Mar54.3°F50.6°F+3.7°USC00511004
1959Apr54.8°F51.4°F+3.4°USC00511004
1959May53.4°F52.8°F+0.5°USC00511004
1959Jun58.4°F55.7°F+2.7°USC00511004
1959Jul57.9°F56.4°F+1.4°USC00511004
1959Aug57.3°F56.7°F+0.5°USC00511004
1959Sep59.7°F55.7°F+4.0°USC00511004
1959Oct56.9°F55.7°F+1.2°USC00511004
1959Nov55.5°F54.3°F+1.2°USC00511004
1959Dec50.3°F52.1°F-1.8°USC00511004
1960Jan50.9°F50.5°F+0.4°USC00511004
1960Feb51.5°F50.0°F+1.5°USC00511004
1960Mar49.7°F50.6°F-1.0°USC00511004
1960Apr52.3°F51.4°F+0.9°USC00511004
1960May54.9°F52.8°F+2.0°USC00511004
1960Jun56.0°F55.7°F+0.3°USC00511004
1960Jul55.9°F56.4°F-0.6°USC00511004
1960Aug56.9°F56.7°F+0.2°USC00511004
1960Sep55.5°F55.7°F-0.1°USC00511004
1960Oct55.8°F55.7°F+0.1°USC00511004
1960Nov54.2°F54.3°F+0.0°USC00511004
1960Dec52.2°F52.1°F+0.2°USC00511004
1961Jan51.0°F50.5°F+0.5°USC00511004
1961Feb53.1°F50.0°F+3.1°USC00511004
1961Mar51.9°F50.6°F+1.2°USC00511004
1961Apr53.6°F51.4°F+2.3°USC00511004
1961May56.5°F52.8°F+3.7°USC00511004
1961Jun56.2°F55.7°F+0.6°USC00511004
1961Jul54.3°F56.4°F-2.1°USC00511004
1961Aug56.5°F56.7°F-0.2°USC00511004
1961Sep55.3°F55.7°F-0.4°USC00511004
1961Oct55.5°F55.7°F-0.1°USC00511004
1961Nov51.0°F54.3°F-3.2°USC00511004
1961Dec51.8°F52.1°F-0.3°USC00511004
1962Jan52.3°F50.5°F+1.8°USC00511004
1962Feb50.3°F50.0°F+0.3°USC00511004
1962Mar48.3°F50.6°F-2.3°USC00511004
1962Apr54.8°F51.4°F+3.4°USC00511004
1962May54.2°F52.8°F+1.4°USC00511004
1962Jun58.1°F55.7°F+2.4°USC00511004
1962Jul55.5°F56.4°F-0.9°USC00511004
1962Aug55.9°F56.7°F-0.8°USC00511004
1962Sep55.0°F55.7°F-0.7°USC00511004
1962Oct54.2°F55.7°F-1.5°USC00511004
1962Nov53.6°F54.3°F-0.7°USC00511004
1962Dec51.2°F52.1°F-0.8°USC00511004
1963Jan50.1°F50.5°F-0.4°USC00511004
1963Feb52.5°F50.0°F+2.5°USC00511004
1963Mar51.8°F50.6°F+1.1°USC00511004
1963Apr52.2°F51.4°F+0.8°USC00511004
1963May51.8°F52.8°F-1.0°USC00511004
1963Jun53.6°F55.7°F-2.1°USC00511004
1963Jul54.9°F56.4°F-1.5°USC00511004
1963Aug55.9°F56.7°F-0.8°USC00511004
1963Sep57.5°F55.7°F+1.9°USC00511004
1963Oct55.7°F55.7°F+0.0°USC00511004
1963Nov53.0°F54.3°F-1.3°USC00511004
1963Dec51.8°F52.1°F-0.2°USC00511004
1964Jan51.3°F50.5°F+0.8°USC00511004
1964Feb47.5°F50.0°F-2.5°USC00511004
1964Mar50.2°F50.6°F-0.4°USC00511004
1964Apr51.1°F51.4°F-0.2°USC00511004
1964May51.2°F52.8°F-1.6°USC00511004
1964Jun57.8°F55.7°F+2.1°USC00511004
1964Jul56.0°F56.4°F-0.5°USC00511004
1964Aug54.5°F56.7°F-2.2°USC00511004
1964Sep54.4°F55.7°F-1.3°USC00511004
1964Oct53.9°F55.7°F-1.8°USC00511004
1964Nov52.2°F54.3°F-2.0°USC00511004
1964Dec54.4°F52.1°F+2.4°USC00511004
1965Jan49.8°F50.5°F-0.7°USC00511004
1965Feb45.1°F50.0°F-4.9°USC00511004
1965Mar46.9°F50.6°F-3.7°USC00511004
1965Apr51.3°F51.4°F-0.1°USC00511004
1965May53.9°F52.8°F+1.0°USC00511004
1965Jun55.7°F55.7°F+0.0°USC00511004
1965Jul55.1°F56.4°F-1.3°USC00511004
1965Aug54.4°F56.7°F-2.4°USC00511004
1965Sep54.3°F55.7°F-1.3°USC00511004
1965Oct53.2°F55.7°F-2.5°USC00511004
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1993Dec53.5°F52.1°F+1.4°USC00511004
1994Jan50.1°F50.5°F-0.4°USC00511004
1994Feb50.8°F50.0°F+0.8°USC00511004
1994Mar50.2°F50.6°F-0.5°USC00511004
1994Apr51.8°F51.4°F+0.4°USC00511004
1994May54.7°F52.8°F+1.9°USC00511004
1994Jun55.2°F55.7°F-0.5°USC00511004
1994Jul60.3°F56.4°F+3.9°USC00511004
1994Aug58.6°F56.7°F+1.8°USC00511004
1994Sep57.5°F55.7°F+1.9°USC00511004
1994Oct55.2°F55.7°F-0.5°USC00511004
1994Nov54.4°F54.3°F+0.1°USC00511004
1994Dec52.7°F52.1°F+0.7°USC00511004
1995Jan55.2°F50.5°F+4.7°USC00511004
1995Feb50.6°F50.0°F+0.6°USC00511004
1995Mar52.9°F50.6°F+2.3°USC00511004
1995Apr51.1°F51.4°F-0.2°USC00511004
1995May53.9°F52.8°F+1.1°USC00511004
1995Jun56.9°F55.7°F+1.3°USC00511004
1995Jul56.0°F56.4°F-0.4°USC00511004
1995Aug57.5°F56.7°F+0.8°USC00511004
1995Sep55.9°F55.7°F+0.3°USC00511004
1995Oct54.6°F55.7°F-1.0°USC00511004
1995Nov56.4°F54.3°F+2.2°USC00511004
1995Dec56.0°F52.1°F+3.9°USC00511004
1996Jan69.5°F50.5°F+19.0°USC00511125
1996Feb50.7°F50.0°F+0.7°USC00511004
1996Mar51.0°F50.6°F+0.4°USC00511004
1996Apr55.1°F51.4°F+3.8°USC00511004
1996May56.0°F52.8°F+3.1°USC00511004
1996Jun56.9°F55.7°F+1.3°USC00511004
1996Jul57.7°F56.4°F+1.2°USC00511004
1996Aug58.6°F56.7°F+1.9°USC00511004
1996Sep57.0°F55.7°F+1.4°USC00511004
1996Oct58.8°F55.7°F+3.1°USC00511004
1996Nov55.6°F54.3°F+1.3°USC00511004
1996Dec51.5°F52.1°F-0.5°USC00511004
1997Jan52.8°F50.5°F+2.3°USC00511004
1997Feb51.6°F50.0°F+1.6°USC00511004
1997Mar51.9°F50.6°F+1.3°USC00511004
1997Apr52.8°F51.4°F+1.5°USC00511004
1997May53.0°F52.8°F+0.1°USC00511004
1997Jun55.9°F55.7°F+0.2°USC00511004
1997Jul56.3°F56.4°F-0.1°USC00511004
1997Aug57.8°F56.7°F+1.0°USC00511004
1997Sep57.0°F55.7°F+1.4°USC00511004
1997Oct57.2°F55.7°F+1.5°USC00511004
1997Nov54.2°F54.3°F-0.1°USC00511004
1997Dec52.6°F52.1°F+0.6°USC00511004
1998Jan51.0°F50.5°F+0.5°USC00511004
1998Feb53.1°F50.0°F+3.1°USC00511004
1998Mar51.9°F50.6°F+1.2°USC00511004
1998Apr48.5°F51.4°F-2.9°USC00511004
1998May52.0°F52.8°F-0.8°USC00511004
1998Jun55.3°F55.7°F-0.4°USC00511004
1998Jul59.5°F56.4°F+3.0°USC00511004
1998Aug56.4°F56.7°F-0.4°USC00511004
1998Sep55.3°F55.7°F-0.3°USC00511004
1998Oct56.0°F55.7°F+0.4°USC00511004
1998Nov54.3°F54.3°F+0.1°USC00511004
1998Dec51.2°F52.1°F-0.9°USC00511004
1999Jan52.0°F50.5°F+1.5°USC00511004
1999Feb49.9°F50.0°F-0.1°USC00511004
1999Mar50.9°F50.6°F+0.2°USC00511004
1999Apr50.0°F51.4°F-1.4°USC00511004
1999May54.7°F52.8°F+1.8°USC00511004
1999Jun57.6°F55.7°F+1.9°USC00511004
1999Jul57.0°F56.4°F+0.6°USC00511004
1999Aug57.8°F56.7°F+1.1°USC00511004
1999Sep53.3°F55.7°F-2.4°USC00511004
1999Oct55.7°F55.7°F+0.0°USC00511004
1999Nov55.3°F54.3°F+1.0°USC00511004
1999Dec51.2°F52.1°F-0.9°USC00511004
2000Jan49.7°F50.5°F-0.8°USC00511004
2000Feb56.2°F50.0°F+6.1°USC00511004
2000Mar53.0°F50.6°F+2.3°USC00511004
2000Apr52.3°F51.4°F+1.0°USC00511004
2000May57.5°F52.8°F+4.7°USC00511004
2000Jun55.7°F55.7°F+0.0°USC00511004
2000Jul56.4°F56.4°F+0.0°USC00511004
2000Aug56.8°F56.7°F+0.1°USC00511004
2000Sep55.9°F55.7°F+0.2°USC00511004
2000Oct56.0°F55.7°F+0.4°USC00511004
2000Nov55.1°F54.3°F+0.8°USC00511004
2000Dec54.3°F52.1°F+2.3°USC00511004
2001Jan55.7°F50.5°F+5.2°USC00511004
2001Feb49.8°F50.0°F-0.2°USC00511004
2001Mar50.8°F50.6°F+0.1°USC00511004
2001Apr51.2°F51.4°F-0.2°USC00511004
2001May53.4°F52.8°F+0.6°USC00511004
2001Jun55.7°F55.7°F+0.1°USC00511004
2001Jul57.9°F56.4°F+1.5°USC00511004
2001Aug59.2°F56.7°F+2.5°USC00511004
2001Sep58.2°F55.7°F+2.6°USC00511004
2001Oct54.9°F55.7°F-0.8°USC00511004
2001Nov58.7°F54.3°F+4.5°USC00511004
2001Dec53.5°F52.1°F+1.4°USC00511004
2002Jan52.8°F50.5°F+2.3°USC00511004
2002Feb52.2°F50.0°F+2.2°USC00511004
2002Mar51.8°F50.6°F+1.2°USC00511004
2002Apr54.9°F51.4°F+3.6°USC00511004
2002May71.6°F52.8°F+18.8°USC00511125
2002Jun58.3°F55.7°F+2.7°USC00511004
2002Jul60.0°F56.4°F+3.6°USC00511004
2002Aug74.3°F56.7°F+17.5°USC00511125
2002Sep55.1°F55.7°F-0.5°USC00511004
2002Oct57.1°F55.7°F+1.4°USC00511004
2002Nov56.6°F54.3°F+2.3°USC00511004
2002Dec54.1°F52.1°F+2.0°USC00511004
2003Jan52.7°F50.5°F+2.2°USC00511004
2003Feb51.0°F50.0°F+1.0°USC00511004
2003Mar53.0°F50.6°F+2.4°USC00511004
2003Apr51.5°F51.4°F+0.2°USC00511004
2003May57.0°F52.8°F+4.1°USC00511004
2003Jun56.2°F55.7°F+0.5°USC00511004
2003Jul58.2°F56.4°F+1.7°USC00511004
2003Aug57.6°F56.7°F+0.9°USC00511004
2003Sep56.3°F55.7°F+0.7°USC00511004
2003Oct56.6°F55.7°F+1.0°USC00511004
2003Nov53.3°F54.3°F-1.0°USC00511004
2003Dec54.6°F52.1°F+2.5°USC00511004
2004Jan53.0°F50.5°F+2.5°USC00511004
2004Feb69.1°F50.0°F+19.1°USC00517000
2004Mar51.2°F50.6°F+0.6°USC00511004
2004Apr51.2°F51.4°F-0.1°USC00511004
2004May55.5°F52.8°F+2.7°USC00511004
2004Jun56.3°F55.7°F+0.6°USC00511004
2004Jul56.8°F56.4°F+0.3°USC00511004
2004Aug58.8°F56.7°F+2.1°USC00511004
2004Sep55.7°F55.7°F+0.0°USC00511004
2004Oct55.0°F55.7°F-0.7°USC00511004
2004Nov54.4°F54.3°F+0.1°USC00511004
2004Dec51.0°F52.1°F-1.1°USC00511004
2005Jan52.1°F50.5°F+1.6°USC00511004
2005Feb52.0°F50.0°F+2.0°USC00511004
2005Mar52.5°F50.6°F+1.9°USC00511004
2005Apr53.1°F51.4°F+1.7°USC00511004
2005May56.2°F52.8°F+3.4°USC00511004
2005Jun54.9°F55.7°F-0.8°USC00511004
2005Jul57.3°F56.4°F+0.9°USC00511004
2005Aug56.9°F56.7°F+0.2°USC00511004
2005Sep56.9°F55.7°F+1.3°USC00511004
2005Oct54.3°F55.7°F-1.4°USC00511004
2005Nov54.4°F54.3°F+0.1°USC00511004
2005Dec54.9°F52.1°F+2.8°USC00511004
2006Jan53.3°F50.5°F+2.8°USC00511004
2006Feb49.0°F50.0°F-1.0°USC00511004
2006Mar53.1°F50.6°F+2.4°USC00511004
2006Apr51.7°F51.4°F+0.4°USC00511004
2006May52.7°F52.8°F-0.2°USC00511004
2006Jun60.6°F55.7°F+4.9°USC00511004
2006Jul71.1°F56.4°F+14.7°USC00517000
2006Aug58.0°F56.7°F+1.2°USC00511004
2006Sep56.6°F55.7°F+1.0°USC00511004
2006Oct56.9°F55.7°F+1.2°USC00511004
2006Nov56.2°F54.3°F+1.9°USC00511004
2006Dec55.5°F52.1°F+3.4°USC00511004
2007Jan54.0°F50.5°F+3.5°USC00511004
2007Feb50.9°F50.0°F+0.9°USC00511004
2007Mar52.2°F50.6°F+1.5°USC00511004
2007Apr50.2°F51.4°F-1.2°USC00511004
2007May56.1°F52.8°F+3.2°USC00511004
2007Jun56.2°F55.7°F+0.5°USC00511004
2007Jul59.3°F56.4°F+2.8°USC00511004
2007Aug56.9°F56.7°F+0.2°USC00511004
2007Sep54.9°F55.7°F-0.8°USC00511004
2007Oct54.8°F55.7°F-0.9°USC00511004
2007Nov53.9°F54.3°F-0.4°USC00511004
2007Dec69.4°F52.1°F+17.4°USC00517000
2008Jan48.2°F50.5°F-2.3°USC00511004
2008Feb67.4°F50.0°F+17.4°USC00517000
2008Mar54.8°F50.6°F+4.2°USC00511004
2008Apr53.0°F51.4°F+1.6°USC00511004
2008May54.2°F52.8°F+1.3°USC00511004
2008Jun71.4°F55.7°F+15.8°USC00517000
2008Jul55.7°F56.4°F-0.7°USC00511004
2008Aug55.9°F56.7°F-0.9°USC00511004
2008Sep54.2°F55.7°F-1.4°USC00511004
2008Oct55.5°F55.7°F-0.2°USC00511004
2008Nov55.2°F54.3°F+0.9°USC00511004
2008Dec53.2°F52.1°F+1.1°USC00511004
2009Jan51.1°F50.5°F+0.6°USC00511004
2009Feb49.0°F50.0°F-1.0°USC00511004
2009Mar59.4°F50.6°F+8.8°USC00515000
2009Apr67.4°F51.4°F+16.1°USC00517000
2009May54.0°F52.8°F+1.2°USC00511004
2009Jun72.8°F55.7°F+17.1°USC00517000
2009Jul57.5°F56.4°F+1.1°USC00511004
2009Aug59.8°F56.7°F+3.1°USC00511004
2009Sep56.4°F55.7°F+0.7°USC00511004
2009Oct58.3°F55.7°F+2.6°USC00511004
2009Nov54.6°F54.3°F+0.3°USC00511004
2009Dec52.8°F52.1°F+0.8°USC00511004
2010Jan56.8°F50.5°F+6.3°USC00511004
2010Feb51.2°F50.0°F+1.2°USC00511004
2010Mar48.7°F50.6°F-2.0°USC00511004
2010Apr53.2°F51.4°F+1.9°USC00511004
2010May56.0°F52.8°F+3.2°USC00511004
2010Jun59.5°F55.7°F+3.8°USC00511004
2010Jul56.3°F56.4°F-0.1°USC00511004
2010Aug57.5°F56.7°F+0.8°USC00511004
2010Sep56.2°F55.7°F+0.6°USC00511004
2010Oct53.9°F55.7°F-1.7°USC00511004
2010Nov53.1°F54.3°F-1.1°USC00511004
2010Dec52.6°F52.1°F+0.5°USC00511004
2011Jan68.9°F50.5°F+18.4°USC00517000
2011Feb51.8°F50.0°F+1.8°USC00511004
2011Mar52.8°F50.6°F+2.2°USC00511004
2011Apr71.0°F51.4°F+19.6°USC00517000
2011May54.1°F52.8°F+1.2°USC00511004
2011Jun57.0°F55.7°F+1.3°USC00511004
2011Jul56.5°F56.4°F+0.1°USC00511004
2011Aug56.2°F56.7°F-0.5°USC00511004
2011Sep72.0°F55.7°F+16.3°USC00517000
2011Oct71.8°F55.7°F+16.1°USC00517000
2011Nov52.9°F54.3°F-1.4°USC00511004
2011Dec68.4°F52.1°F+16.3°USC00517000
2012Jan69.1°F50.5°F+18.6°USC00517000
2012Feb68.3°F50.0°F+18.3°USC00517000
2012Mar50.5°F50.6°F-0.1°USC00511004
2012Apr68.5°F51.4°F+17.2°USC00517000
2012May69.4°F52.8°F+16.6°USC00517000
2012Jun70.3°F55.7°F+14.6°USC00517000
2012Jul71.1°F56.4°F+14.7°USC00517000
2012Aug72.1°F56.7°F+15.4°USC00517000
2012Sep71.8°F55.7°F+16.1°USC00517000
2012Oct73.0°F55.7°F+17.3°USC00517000
2012Nov70.9°F54.3°F+16.7°USC00517000
2012Dec70.0°F52.1°F+18.0°USC00517000
2013Jan59.8°F50.5°F+9.3°USR0000HKAU
2013Feb64.2°F50.0°F+14.1°USR0000HKAU
2013Mar63.3°F50.6°F+12.7°USR0000HKAU
2013Apr65.4°F51.4°F+14.1°USR0000HKAU
2013May63.2°F52.8°F+10.4°USR0000HKAU
2013Jun65.5°F55.7°F+9.9°USR0000HKAU
2013Jul65.5°F56.4°F+9.1°USR0000HKAU
2013Aug69.9°F56.7°F+13.2°USR0000HKAU
2013Sep70.8°F55.7°F+15.2°USR0000HKAU
2013Oct65.8°F55.7°F+10.2°USR0000HKAU
2013Nov64.1°F54.3°F+9.8°USR0000HKAU
2013Dec63.2°F52.1°F+11.2°USR0000HKAU
2014Jan62.9°F50.5°F+12.4°USR0000HKAU
2014Feb62.4°F50.0°F+12.4°USR0000HKAU
2014Mar61.5°F50.6°F+10.9°USR0000HKAU
2014Apr65.2°F51.4°F+13.9°USR0000HKAU
2014May70.3°F52.8°F+17.5°USR0000HKAU
2014Jun68.9°F55.7°F+13.3°USR0000HKAU
2014Jul71.3°F56.4°F+14.9°USR0000HKAU
2014Aug67.4°F56.7°F+10.7°USR0000HKAU
2014Sep68.3°F55.7°F+12.7°USR0000HKAU
2014Oct67.6°F55.7°F+11.9°USR0000HKAU
2014Nov63.7°F54.3°F+9.4°USR0000HKAU
2014Dec60.8°F52.1°F+8.8°USR0000HKAU
2015Jan62.6°F50.5°F+12.1°USR0000HKAU
2015Feb52.7°F50.0°F+2.7°USC00511004
2015Mar49.5°F50.6°F-1.1°USC00511004
2015Apr52.8°F51.4°F+1.5°USC00511004
2015May63.1°F52.8°F+10.2°USR0000HKAU
2015Jun69.6°F55.7°F+14.0°USR0000HKAU
2015Jul69.3°F56.4°F+12.9°USR0000HKAU
2015Aug70.6°F56.7°F+13.9°USR0000HKAU
2015Sep70.0°F55.7°F+14.3°USR0000HKAU
2015Oct67.5°F55.7°F+11.8°USR0000HKAU
2015Nov65.9°F54.3°F+11.6°USR0000HKAU
2015Dec62.7°F52.1°F+10.6°USR0000HKAU
2016Jan60.7°F50.5°F+10.2°USR0000HKAU
2016Feb60.5°F50.0°F+10.5°USR0000HKAU
2016Mar60.4°F50.6°F+9.8°USR0000HKAU
2016Apr63.9°F51.4°F+12.5°USR0000HKAU
2016May64.1°F52.8°F+11.3°USR0000HKAU
2016Jun69.0°F55.7°F+13.3°USR0000HKAU
2016Jul72.0°F56.4°F+15.5°USR0000HKAU
2016Aug73.8°F56.7°F+17.1°USR0000HKAU
2016Sep73.5°F55.7°F+17.9°USR0000HKAU
2016Oct75.6°F55.7°F+20.0°USR0000HKAU
2016Nov74.8°F54.3°F+20.5°USR0000HKAU
2016Dec70.2°F52.1°F+18.1°USR0000HKAU
2017Jan67.3°F50.5°F+16.8°USR0000HKAU
2017Feb52.1°F50.0°F+2.1°USC00511004
2017Mar54.0°F50.6°F+3.4°USC00511004
2017Apr54.2°F51.4°F+2.9°USC00511004
2017May63.7°F52.8°F+10.8°USC00515000
2017Jun65.4°F55.7°F+9.7°USC00515000
2017Jul67.0°F56.4°F+10.6°USC00515000
2017Aug75.0°F56.7°F+18.3°USC00517000
2017Sep56.5°F55.7°F+0.9°USC00511004
2017Oct53.7°F55.7°F-2.0°USC00511004
2017Nov52.8°F54.3°F-1.5°USC00511004
2017Dec50.3°F52.1°F-1.8°USC00511004
2018Jan54.1°F50.5°F+3.6°USC00511004
2018Feb51.1°F50.0°F+1.1°USC00511004
2018Mar51.5°F50.6°F+0.8°USC00511004
2018Apr54.2°F51.4°F+2.8°USC00511004
2018May55.6°F52.8°F+2.8°USC00511004
2018Jun57.4°F55.7°F+1.7°USC00511004
2018Jul57.3°F56.4°F+0.9°USC00511004
2018Aug67.8°F56.7°F+11.1°USC00515000
2018Sep59.1°F55.7°F+3.4°USC00511004
2018Oct66.7°F55.7°F+11.1°USC00515000
2018Nov72.4°F54.3°F+18.2°USC00517000
2018Dec62.5°F52.1°F+10.5°USC00515000
2019Jan60.1°F50.5°F+9.6°USC00515000
2019Feb71.1°F50.0°F+21.1°USC00517000
2019Mar58.9°F50.6°F+8.3°USC00515000
2019Apr62.7°F51.4°F+11.4°USC00515000
2019May63.8°F52.8°F+11.0°USC00515000
2019Jun66.3°F55.7°F+10.6°USC00515000
2019Jul75.2°F56.4°F+18.8°USC00517000
2019Aug76.0°F56.7°F+19.3°USC00517000
2019Sep76.4°F55.7°F+20.7°USC00517000
2019Oct75.0°F55.7°F+19.3°USC00517000
2019Nov74.1°F54.3°F+19.8°USC00517000
2019Dec71.7°F52.1°F+19.6°USC00517000
2020Jan62.3°F50.5°F+11.8°USC00515000
2020Feb60.2°F50.0°F+10.2°USC00515000
2020Mar61.5°F50.6°F+10.9°USC00515000
2020Apr62.6°F51.4°F+11.2°USC00515000
2020May63.9°F52.8°F+11.1°USC00515000
2020Jun65.6°F55.7°F+9.9°USC00515000
2020Jul66.6°F56.4°F+10.2°USC00515000
2020Aug67.2°F56.7°F+10.5°USC00515000
2020Sep66.8°F55.7°F+11.1°USC00515000
2020Oct66.7°F55.7°F+11.1°USC00515000
2020Nov65.4°F54.3°F+11.1°USC00515000
2020Dec63.7°F52.1°F+11.6°USC00515000
2021Oct76.8°F55.7°F+21.1°USC00517000
2021Dec74.3°F52.1°F+22.2°USC00517000
2022Jan42.8°F50.5°F-7.7°USC00511004
2022Feb74.1°F50.0°F+24.1°USC00517000
2022Mar75.7°F50.6°F+25.0°USC00517000
2022Apr74.2°F51.4°F+22.8°USC00517000

Showing 978 of 978 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 query NOAA's Global Summary of the Month (GSOM) database for the closest weather station with good 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).

181

Initial gaps

163

Filled

18

Unfillable

Fill stations: HANA AIRPORT 355, HI US, HANA 354, HI US, OHE O 258.6, HI US, PAAKEA 350, HI US, KULA BRANCH STATION 324.5, HI US, HONOMANU 450, HI US, KAUPO GAP HAWAII, HI US

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: 1969 – 1994 (100% coverage)

MonthBaselineYears
January50.5°F26/26
February50.0°F26/26
March50.6°F26/26
April51.4°F26/26
May52.8°F26/26
June55.7°F26/26
July56.4°F26/26
August56.7°F26/26
September55.7°F26/26
October55.7°F26/26
November54.3°F26/26
December52.1°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

Time of Observation Bias (TOBS)

Early cooperative weather stations typically read their min/max thermometers in the afternoon. This meant a single hot afternoon's peak temperature could be counted in two consecutive daily readings, inflating monthly maximums.

Between the 1950s and 1980s, most stations switched to morning or midnight observation times. This eliminated the warm bias but introduced a slight cool bias during the transition.

As a result, early decades in our data may read slightly warmer than they actually were, and the transition period may show an artificial cooling dip. Neither reflects actual temperature change. We use raw GSOM data without TOBS adjustments (NOAA's adjusted products like nClimDiv correct for this, but our station-level data does not).

Frequently Asked Questions

Is Hana, Hawaii getting warmer?

Based on 81+ years of NOAA temperature records, Hana has warmed at a rate of approximately 0.50°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 Hana?

The warmest year on record in Hana was 1943, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Hana come from?

Data comes from the HALEAKALA RANGER STATION 338, HI US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 81+ years of temperature observations used to build Hana's climate profile.

How are the climate visualizations for Hana created?

Three visualizations are generated from Hana'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 Hana's temperature data?

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

Wear Hana's Climate Story

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

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