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Honolulu, Hawaii climate

BSh Hot semi-arid

Honolulu has a remarkably steady tropical climate (Hot semi-arid, Köppen BSh). The hottest month is August with an average daily high near 89°F, while the coldest is January averaging around 67°F at night. Precipitation totals about 16 inches a year and is strongly seasonal — March alone averages 2.4 inches while June barely receives 0.50 inches.

☀️ Summers
Hot
Highs near 89°F in August.
About 32 days a year above 90 °F
❄️ Winters
Mild
Lows near 67°F in January.
🌧️ Rain
Fairly dry
About 16 in of rain a year.
Wettest in March
⛅ Sky & trend
Partly cloudy
A roughly even mix of sun and cloud.
+0.6 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures TEMPERATURE °F 60°70°80°90°100° PRECIPITATION (in) 01.53 JanAprJulOct

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts 0%25%50%75%100% JanAprJulOct Cloudy Partly Cloudy Clear

Honolulu climate normals (1991–2020)

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°F)818181838587888988878482
Avg temp (°F)747475777880828282807876
Avg low (°F)676768707274757675747269
Precipitation (in)1.81.92.40.80.80.50.50.80.91.52.32.2
Jan – JunJanFebMarAprMayJun
Avg high (°F)818181838587
Avg temp (°F)747475777880
Avg low (°F)676768707274
Precipitation (in)1.81.92.40.80.80.5
Jul – DecJulAugSepOctNovDec
Avg high (°F)888988878482
Avg temp (°F)828282807876
Avg low (°F)757675747269
Precipitation (in)0.50.80.91.52.32.2

How often — frequency of weather events

JanFebMarAprMayJunJulAugSepOctNovDec
Days with measurable rain (days)789766767899
Days with high ≥ 90°F (days)———0.10.72710930.2—
Jan – JunJanFebMarAprMayJun
Days with measurable rain (days)789766
Days with high ≥ 90°F (days)———0.10.72
Jul – DecJulAugSepOctNovDec
Days with measurable rain (days)767899
Days with high ≥ 90°F (days)710930.2—

Sky & atmosphere

JanFebMarAprMayJunJulAugSepOctNovDec
Cloud cover (%)515356544844464444535653
Clear days (≤ 30% cloud)877688799667
Partly cloudy days (30–70%)151313161718191816161415
Cloudy days (≥ 70%)88118644459109
Relative humidity (%)757474747474747474757576
Wind speed (mph)10.611.412.112.911.813.814.213.712.211.612.311.9
Jan – JunJanFebMarAprMayJun
Cloud cover (%)515356544844
Clear days (≤ 30% cloud)877688
Partly cloudy days (30–70%)151313161718
Cloudy days (≥ 70%)8811864
Relative humidity (%)757474747474
Wind speed (mph)10.611.412.112.911.813.8
Jul – DecJulAugSepOctNovDec
Cloud cover (%)464444535653
Clear days (≤ 30% cloud)799667
Partly cloudy days (30–70%)191816161415
Cloudy days (≥ 70%)4459109
Relative humidity (%)747474757576
Wind speed (mph)14.213.712.211.612.311.9

30-year delta table (1991–2020 minus 1981–2010, °F)

JanFebMarAprMayJunJulAugSepOctNovDec
Δ Max temp+0.4+0.3+0.0+0.4+0.2-0.1+0.2+0.1-0.2+0.2+0.2+0.6
Δ Avg temp+0.4+0.7+0.2+0.5+0.4+0.1+0.4+0.3+0.1+0.4+0.4+0.7
Δ Min temp+0.5+1.0+0.4+0.7+0.6+0.4+0.6+0.5+0.4+0.5+0.4+0.9
Jan – JunJanFebMarAprMayJun
Δ Max temp+0.4+0.3+0.0+0.4+0.2-0.1
Δ Avg temp+0.4+0.7+0.2+0.5+0.4+0.1
Δ Min temp+0.5+1.0+0.4+0.7+0.6+0.4
Jul – DecJulAugSepOctNovDec
Δ Max temp+0.2+0.1-0.2+0.2+0.2+0.6
Δ Avg temp+0.4+0.3+0.1+0.4+0.4+0.7
Δ Min temp+0.6+0.5+0.4+0.5+0.4+0.9
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Honolulu Intl AP (NOAA GHCN station USW00022521), about 9 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →