Sapporo weather in September
September in Sapporo: nice, rainy, with clean air — a great time to visit.
#4 of 12 months in Sapporo · #331 of 604 destinations to visit in September · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Sapporo climate normals — September
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 123 mm / 4.8 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 8.4 h/day | |
| Daylight | 12.5 h | |
| Wind | 14 km/h / 8 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Sapporo?
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Sapporo in September — FAQ
- Is September a good time to visit Sapporo?
- September in Sapporo: nice, rainy, with clean air — a great time to visit. It ranks #4 of 12 months for Sapporo on SeasonMap's comfort score (79/100).
- What is the weather like in Sapporo in September?
- In September, Sapporo averages a daily high of 21.8°C and a low of 15.6°C, with about 122.8 mm of rain over roughly 14 rainy days.
- What is the air quality in Sapporo in September?
- Sapporo has a mean US Air Quality Index of about 36 in September.