Sendai weather in October
October in Sendai: nice, soaked, with clean air — fine if you can take 12 rainy days.
#3 of 12 months in Sendai · #412 of 897 destinations to visit in October · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
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Sendai climate normals — October
| Daytime high | 19°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Rainfall | 153 mm / 6 in | ⛈ soaked |
| Rainy days | 12 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 7 h/day | |
| Daylight | 11.2 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Sendai in October — FAQ
- Is October a good time to visit Sendai?
- October in Sendai: nice, soaked, with clean air — fine if you can take 12 rainy days. It ranks #3 of 12 months for Sendai on SeasonMap's comfort score (80/100).
- What is the weather like in Sendai in October?
- In October, Sendai averages a daily high of 18.5°C and a low of 12°C, with about 152.8 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Sendai in October?
- Sendai has a mean US Air Quality Index of about 35 in October.