Honolulu Climate — Average Highs, Lows & Rainfall by Month
Honolulu has a temperate climate with four distinct seasons. Daytime temperatures average 29°C / 85°F in August, the warmest month, and drop to 25°C / 78°F in February, the coldest. Overnight lows in February average 20°C / 67°F. Honolulu receives about 500 mm of rain a year across roughly 110 wet days, with December the wettest month.
Averages for 2021–2025 · Open-Meteo Historical Weather API (ERA5 reanalysis) · Updated 2026-10-05
Monthly averages in Honolulu
Average daytime high, overnight low and rainfall for each month of the year.
| Month | Avg high | Avg low | Rainfall | Wet days |
|---|---|---|---|---|
| January | 26°C / 78°F | 20°C / 68°F | 71 mm | 10 |
| February | 25°C / 78°F | 20°C / 67°F | 44 mm | 8 |
| March | 26°C / 78°F | 20°C / 69°F | 58 mm | 14 |
| April | 26°C / 79°F | 21°C / 69°F | 59 mm | 14 |
| May | 27°C / 81°F | 22°C / 71°F | 60 mm | 12 |
| June | 28°C / 83°F | 23°C / 73°F | 17 mm | 7 |
| July | 29°C / 84°F | 23°C / 73°F | 18 mm | 6 |
| August | 29°C / 85°F | 23°C / 74°F | 25 mm | 7 |
| September | 29°C / 85°F | 23°C / 74°F | 19 mm | 7 |
| October | 29°C / 84°F | 23°C / 73°F | 28 mm | 8 |
| November | 28°C / 82°F | 22°C / 71°F | 31 mm | 8 |
| December | 26°C / 79°F | 21°C / 69°F | 72 mm | 9 |
Best time to visit Honolulu
February, March, April offer the most comfortable weather in Honolulu: mild daytime temperatures with the year's lowest rainfall — February averages 25°C (78°F); March averages 26°C (78°F); April averages 26°C (79°F).
Honolulu climate FAQ
- What is the hottest month in Honolulu?
- August is the hottest month in Honolulu, with average daytime highs of 29°C / 85°F and overnight lows of 23°C / 74°F (averages for 2021–2025).
- What is the coldest month in Honolulu?
- February is the coldest month in Honolulu, with average highs of 25°C / 78°F and lows of 20°C / 67°F.
- How much rain does Honolulu get a year?
- Honolulu receives about 500 mm of rainfall a year, spread over roughly 110 wet days. December is the wettest month (72 mm on average) and June the driest (17 mm).
- When is the best time to visit Honolulu?
- February, March, April are the most comfortable months in Honolulu: mild daytime temperatures with the least rainfall of the year.
Want today's conditions instead of averages?
See live weather in Honolulu →Source: Open-Meteo Historical Weather API (ERA5 reanalysis), Open-Meteo. Averages are daily means across 2021–2025 and are rounded for display — for a live forecast see the Honolulu weather page.