Climate in Honolulu — Annual Weather Overview
Honolulu has a semi arid climate — warm and dry with low but seasonal rainfall. The hottest month is August (average high 29.3°C) and the coolest is February (25.1°C). Temperatures are consistent year-round, with highs ranging only 4.2°C between the warmest and coolest months. Annual rainfall is modest at around 440mm, with March the wettest month (77.7mm) and September the driest (16.0mm). Average daily sunshine is 11.2 hours.
**Spring (March, April, May):** average highs 26.0°C, 152mm rain. **Summer (June, July, August):** average highs 28.8°C, 54mm rain. **Autumn (September, October, November):** average highs 28.3°C, 81mm rain. **Winter (December, January, February):** average highs 25.4°C, 152mm rain.
Honolulu — Monthly Temperatures
Honolulu — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Honolulu stays reasonable all year.
Honolulu weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 25.4°C | 20.4°C | 36.2mm | 9.8h | 8 | 10/10 |
| February | 25.1°C | 20.2°C | 46.5mm | 10.4h | 8 | 10/10 |
| March | 25.1°C | 20.4°C | 77.7mm | 10.4h | 16 | 10/10 |
| April | 25.9°C | 21.0°C | 44.2mm | 11.5h | 10 | 10/10 |
| May | 26.9°C | 21.9°C | 30.1mm | 12.2h | 8 | 10/10 |
| June | 28.3°C | 22.8°C | 17.2mm | 12.8h | 7 | 10/10 |
| July | 28.7°C | 23.2°C | 19.1mm | 12.7h | 6 | 10/10 |
| August | 29.3°C | 23.4°C | 18.2mm | 12.6h | 4 | 10/10 |
| September | 29.2°C | 23.4°C | 16.0mm | 11.7h | 5 | 10/10 |
| October | 28.5°C | 22.8°C | 31.9mm | 10.7h | 10 | 10/10 |
| November | 27.3°C | 22.3°C | 33.4mm | 10.1h | 8 | 10/10 |
| December | 25.7°C | 20.8°C | 69.2mm | 9.7h | 8 | 10/10 |
For the full verdict on when to go, see the best time to visit Honolulu. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Honolulu have?
Honolulu has a semi arid climate — warm and dry with low but seasonal rainfall. Average highs range from 25.1°C in February to 29.3°C in August.
What is the hottest month in Honolulu?
August is the hottest month in Honolulu, with average highs of 29.3°C and lows of 23.4°C.
What is the coldest month in Honolulu?
February is the coolest month, with average highs of 25.1°C and lows of 20.2°C.
What is the wettest month in Honolulu?
March is the wettest month, averaging 77.7mm of rainfall over around 16 rainy days.
How much rain does Honolulu get per year?
Honolulu receives around 440mm of rain per year. The driest month is September (16.0mm).
When is the best time to visit Honolulu?
The best time to visit Honolulu is All year. See the full month-by-month guide →
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.