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August is the hottest month in Honolulu HI, with an average high of 89°F / 32°C; January is the coldest (80°F / 27°C). March is the wettest month, averaging 2.4 in / 60 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 80 / 27 | 67 / 19 | 1.8 / 46 | 5 |
| Feb | 81 / 27 | 67 / 20 | 1.9 / 49 | 5 |
| Mar | 81 / 27 | 68 / 20 | 2.4 / 60 | 5 |
| Apr | 83 / 28 | 70 / 21 | 0.7 / 19 | 4 |
| May | 85 / 29 | 72 / 22 | 0.8 / 21 | 3 |
| Jun | 87 / 31 | 74 / 23 | 0.5 / 13 | 2 |
| Jul | 88 / 31 | 75 / 24 | 0.5 / 13 | 3 |
| Aug | 89 / 32 | 76 / 24 | 0.8 / 21 | 2 |
| Sep | 88 / 31 | 75 / 24 | 0.8 / 21 | 4 |
| Oct | 87 / 31 | 74 / 23 | 1.5 / 38 | 4 |
| Nov | 84 / 29 | 72 / 22 | 2.2 / 57 | 5 |
| Dec | 82 / 28 | 69 / 21 | 2.2 / 55 | 5 |
Extremes since 1940: highest 95°F / 35°C (September 19, 1994), lowest 52°F / 11°C (January 20, 1969).
Daylight lasts about 13.3 hours in June and 10.7 hours in December.
Data: Meteostat — Honolulu International Airport, 1991–2020 averages.
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