Hawaii has a warm subtropical climate with warm summers and mild winters.
Hawaii has an average annual temperature of 75.4°F across all 7 cities, with approximately 877 mm of annual precipitation and average humidity of 76%. Temperatures peak in September and drop to their lowest in February, while rainfall is highest during spring and early summer months.
The warmest city is Mililani with average July highs of 81.1°F, while Hilo is the coldest with average January lows of 65.3°F. Humidity remains high throughout the year, especially during winter months, creating warm and humid conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | ⛅ | 75.2°F | 72.7°F | 70.3°F | 81.7°F | 59.4°F | 76% | 94 | 4.6 | 4.20 |
| February | ⛅ | 74.8°F | 72.3°F | 69.6°F | 80.6°F | 57.6°F | 76% | 85 | 4.9 | 4.90 |
| March | ⛅ | 75.2°F | 72.7°F | 70.2°F | 82.4°F | 59.4°F | 76% | 101 | 5.2 | 5.50 |
| April | ⛅ | 76.1°F | 73.6°F | 71.1°F | 82.9°F | 60.4°F | 76% | 85 | 5.6 | 6.20 |
| May | 😎 | 77.7°F | 75.0°F | 72.3°F | 84.6°F | 61.3°F | 76% | 51 | 5.2 | 6.60 |
| June | 😎 | 79.2°F | 76.6°F | 73.9°F | 85.1°F | 64.0°F | 76% | 35 | 5.9 | 6.90 |
| July | 😎 | 80.1°F | 77.5°F | 75.0°F | 86.4°F | 64.6°F | 76% | 50 | 6.1 | 6.70 |
| August | 😎 | 81.0°F | 78.4°F | 75.7°F | 86.0°F | 66.0°F | 76% | 59 | 5.8 | 6.60 |
| September | 😎 | 81.1°F | 78.6°F | 75.9°F | 87.1°F | 65.8°F | 76% | 59 | 5.2 | 6.10 |
| October | 😎 | 80.2°F | 77.7°F | 75.4°F | 86.0°F | 64.9°F | 76% | 78 | 5.0 | 5.20 |
| November | ⛅ | 78.3°F | 75.9°F | 73.8°F | 84.2°F | 63.3°F | 77% | 85 | 5.3 | 4.30 |
| December | ⛅ | 76.1°F | 73.9°F | 71.8°F | 81.9°F | 61.0°F | 77% | 96 | 5.1 | 3.90 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 7 cities in Hawaii
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Moderate Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 7 cities · 1981–2025 · °F
Temperatures rise steadily from spring, peak in September, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 77% in December · annual avg 76%
Monthly averages · 1981–2025
Across 45 years, Hawaii's temperature has remained relatively stable over the past decade. 2025 was the warmest year overall and 1983 the coolest.
The warmest year on record was 2025 (avg: 77.5°F), while the coldest year was 1983 (avg: 73.4°F).
Averaged across all 7 cities in Hawaii · Last 30 years · °F
Averaged across all 7 cities in Hawaii · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 7 cities in Hawaii for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 🔥 | 80.2°F | 77.5°F | 74.7°F | 85.8°F | 63.1°F | 446 | 75% | 5.0 m/s |
2024 | 79.3°F | 76.6°F | 73.9°F | 85.6°F | 62.2°F | 458 | 75% | 5.5 m/s |
2023 | 79.2°F | 76.6°F | 73.9°F | 85.1°F | 63.7°F | 670 | 76% | 5.2 m/s |
2022 | 79.2°F | 76.5°F | 73.8°F | 85.3°F | 62.8°F | 769 | 77% | 5.0 m/s |
2021 | 78.3°F | 75.7°F | 73.2°F | 83.7°F | 63.0°F | 1156 | 77% | 5.6 m/s |
2020 | 79.0°F | 76.6°F | 74.1°F | 85.5°F | 62.2°F | 955 | 77% | 5.3 m/s |
2019 | 79.2°F | 76.6°F | 74.1°F | 86.0°F | 61.3°F | 987 | 77% | 4.9 m/s |
2018 | 78.1°F | 75.7°F | 73.4°F | 84.9°F | 61.0°F | 1384 | 80% | 5.1 m/s |
2017 | 78.8°F | 76.3°F | 73.6°F | 85.5°F | 61.3°F | 944 | 76% | 4.8 m/s |
2016 | 78.4°F | 76.1°F | 73.6°F | 83.7°F | 61.9°F | 969 | 77% | 5.1 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
