Hilo weather in August
August in Hilo: hot, soaked, with clean air — a great time to visit.
#5 of 12 months in Hilo · #417 of 604 destinations to visit in August · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Hilo climate normals — August
| Daytime high | 27°C / 80°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 71°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 215 mm / 8.5 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 20°C / 69°F | |
| Sunshine | 11.8 h/day | |
| Daylight | 12.8 h | |
| Wind | 19 km/h / 11 mph | |
| Air quality (US AQI) | 17 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Hilo?
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Hilo in August — FAQ
- Is August a good time to visit Hilo?
- August in Hilo: hot, soaked, with clean air — a great time to visit. It ranks #5 of 12 months for Hilo on SeasonMap's comfort score (70/100).
- What is the weather like in Hilo in August?
- In August, Hilo averages a daily high of 26.6°C and a low of 21.4°C, with about 214.8 mm of rain over roughly 26 rainy days.
- What is the air quality in Hilo in August?
- Hilo has a mean US Air Quality Index of about 17 in August.