Hiroshima weather in August
August in Hiroshima: sweltering, soaked, with clean air — a fair time to visit.
#12 of 12 months in Hiroshima · #542 of 604 destinations to visit in August · comfort 52/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Hiroshima climate normals — August
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 306 mm / 12 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 9.6 h/day | |
| Daylight | 13.4 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hiroshima in August — FAQ
- Is August a good time to visit Hiroshima?
- August in Hiroshima: sweltering, soaked, with clean air — a fair time to visit. It ranks #12 of 12 months for Hiroshima on SeasonMap's comfort score (52/100).
- What is the weather like in Hiroshima in August?
- In August, Hiroshima averages a daily high of 30.8°C and a low of 24.8°C, with about 305.7 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Hiroshima in August?
- Hiroshima has a mean US Air Quality Index of about 41 in August.