Hiroshima weather in May
May in Hiroshima: warm, rainy — one of the best months to visit.
#2 of 12 months in Hiroshima · #196 of 604 destinations to visit in May · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Hiroshima climate normals — May
| Daytime high | 23°C / 73°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 132 mm / 5.2 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 14 h | |
| Wind | 12 km/h / 8 mph | |
| Air quality (US AQI) | 64 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hiroshima in May — FAQ
- Is May a good time to visit Hiroshima?
- May in Hiroshima: warm, rainy — one of the best months to visit. It ranks #2 of 12 months for Hiroshima on SeasonMap's comfort score (85/100).
- What is the weather like in Hiroshima in May?
- In May, Hiroshima averages a daily high of 22.9°C and a low of 14.9°C, with about 131.6 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Hiroshima in May?
- Hiroshima has a mean US Air Quality Index of about 64 in May.