Sendai weather in August
August in Sendai: warm, soaked, with clean air — fine if you can take 19 rainy days.
#8 of 12 months in Sendai · #679 of 897 destinations to visit in August · comfort 67/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Sendai in August
No notes yet. Open Sendai on the map to add the first one.
Sendai climate normals — August
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Rainfall | 170 mm / 6.7 in | ⛈ soaked |
| Rainy days | 19 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 9 h/day | |
| Daylight | 13.6 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Sendai?
Loading map…
Sendai in August — FAQ
- Is August a good time to visit Sendai?
- August in Sendai: warm, soaked, with clean air — fine if you can take 19 rainy days. It ranks #8 of 12 months for Sendai on SeasonMap's comfort score (67/100).
- What is the weather like in Sendai in August?
- In August, Sendai averages a daily high of 28°C and a low of 22.7°C, with about 169.8 mm of rain over roughly 19.4 rainy days.
- What is the air quality in Sendai in August?
- Sendai has a mean US Air Quality Index of about 40 in August.