Climate-Zone.com

Home › Cities › United States › Hawaii › Honolulu

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 32°C, while the coldest is January averaging around 19°C at night. Precipitation totals about 417 mm a year and is strongly seasonal — March alone averages 60 mm while June barely receives 13 mm.

☀️ Summers
Hot
Highs near 32°C in August.
About 32 days a year above 32 °C
❄️ Winters
Mild
Lows near 19°C in January.
🌧️ Rain
Fairly dry
About 417 mm of rain a year.
Wettest in March
⛅ Sky & trend
Partly cloudy
A roughly even mix of sun and cloud.
+0.3 °C 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 °C 10°20°30°40° PRECIPITATION (mm) 03060 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 (°C)272727282931313231312928
Avg temp (°C)232324252627282828272624
Avg low (°C)192020212223242424232221
Precipitation (mm)474960202113132122385755
Jan – JunJanFebMarAprMayJun
Avg high (°C)272727282931
Avg temp (°C)232324252627
Avg low (°C)192020212223
Precipitation (mm)474960202113
Jul – DecJulAugSepOctNovDec
Avg high (°C)313231312928
Avg temp (°C)282828272624
Avg low (°C)242424232221
Precipitation (mm)132122385755

How often — frequency of weather events

JanFebMarAprMayJunJulAugSepOctNovDec
Days with measurable rain (days)789766767899
Days with high ≥ 32°C (days)———0.10.72710930.2—
Jan – JunJanFebMarAprMayJun
Days with measurable rain (days)789766
Days with high ≥ 32°C (days)———0.10.72
Jul – DecJulAugSepOctNovDec
Days with measurable rain (days)767899
Days with high ≥ 32°C (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 →