What is the weather like in Karuizawa vs Sapporo in September?

In September, Karuizawa averages 21°C high / 13°C low with about 179 mm of rain; Sapporo averages 23°C high / 15°C low with about 131 mm.

Karuizawa vs Sapporo in September

Sapporo is the better pick in September — 86 vs 78 on SeasonMap's comfort score. Sapporo is warm, rainy, clean air, while Karuizawa is nice, soaked, clean air.

Karuizawa vs Sapporo — September climate, side by side

	🇯🇵 Karuizawa	🇯🇵 Sapporo
Comfort score	78/100 (B)	86/100 (A)
Feels-like high	23°C	24°C
Avg high / low	21° / 13°	23° / 15°
Rainfall	179 mm	131 mm
Rainy days	21	13
Humidity	87%	82%
Air quality (AQI)	40	36

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Karuizawa vs Sapporo in September — FAQ

Is September better in Karuizawa or Sapporo?: Sapporo is the better pick in September — 86 vs 78 on SeasonMap's comfort score. Sapporo is warm, rainy, clean air, while Karuizawa is nice, soaked, clean air.
What is the weather like in Karuizawa vs Sapporo in September?: In September, Karuizawa averages 21°C high / 13°C low with about 179 mm of rain; Sapporo averages 23°C high / 15°C low with about 131 mm.