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Best time to visit · Hawaii, United States
For the most comfortable weather in Oahu, aim for January and May – September. July tops our comfort score at 93/100, with highs around 80°F (27°C) and 1.6 in (40 mm) of rain. February, April and October are good shoulder-season months. The toughest months are March and November & December, mainly because of cloud cover.
Highs run from 74°F to 81°F across the year, and the yearly total is about 30.4 in (771 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 75°F24°C | 74°F24°C | 75°F24°C | 76°F25°C | 78°F26°C | 79°F26°C | 80°F27°C | 81°F27°C | 81°F27°C | 80°F27°C | 78°F26°C | 76°F24°C |
| Avg low | 70°F21°C | 69°F21°C | 69°F21°C | 71°F22°C | 72°F22°C | 74°F23°C | 75°F24°C | 76°F24°C | 76°F24°C | 75°F24°C | 73°F23°C | 71°F22°C |
| Rain | 2.8 in71 mm | 3.2 in82 mm | 3.7 in94 mm | 2.1 in54 mm | 1.9 in47 mm | 1.5 in37 mm | 1.6 in40 mm | 1.7 in44 mm | 2.0 in50 mm | 2.9 in73 mm | 3.4 in86 mm | 3.7 in93 mm |
| Humidity | 75% | 75% | 75% | 75% | 74% | 74% | 74% | 74% | 74% | 75% | 76% | 77% |
| Cloud | 48% | 54% | 58% | 55% | 47% | 45% | 43% | 43% | 42% | 52% | 54% | 50% |
| Comfort | 87 | 83 | 80 | 86 | 91 | 92 | 93 | 91 | 91 | 85 | 82 | 82 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 78 m (256 ft), close to Oahu's own ~165 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
Temperatures barely move through the year in Oahu (highs stay between 74°F and 81°F), so rain is what really separates the seasons.
Temperatures hold fairly even, with highs of 76–81°F (25–27°C). It's the driest half, with only about 10.7 in (272 mm) of rain, 35% of the year's total. April feels humid, with humidity near 75%. May – September are among the best-scoring months (season average 91/100).
Expect steady highs of 74–80°F (24–27°C). It's the wettest half, with about 19.6 in (499 mm) of rain, 65% of the year's total. October – March feel humid, with humidity near 75%. Comfort peaks here: January ranks with the year's best, and the season averages 83/100.
By comfort score: 12 Great. Tap a month for its own guide.
For the most comfortable weather in Oahu, aim for January and May – September. July tops our comfort score at 93/100, with highs around 80°F (27°C) and 1.6 in (40 mm) of rain. February, April and October are good shoulder-season months. The toughest months are March and November & December, mainly because of cloud cover.
March is the wettest month, averaging about 3.7 in (94 mm) of rain. June is the driest, with about 1.5 in (37 mm). The yearly total is around 30.4 in (771 mm).
February is the coldest, with average lows of 69°F (21°C) and highs of 74°F (24°C). The warmest is September, with average highs of 81°F (27°C).
Yes for much of the year: humidity averages 75% annually, and October – April combine warmth with 75%+ humidity, which feels sticky.
The wettest three-month stretch is October – December, with about 9.9 in (252 mm) of rain combined. The driest stretch is June – August, with about 4.8 in (121 mm).
Poll the group on January and May – September dates, then plan the days, packing and costs together.
