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

In September, Karuizawa averages 21°C high / 13°C low with about 179 mm of rain; Tokyo averages 28°C high / 21°C low with about 160 mm.

Karuizawa vs Tokyo in September

Karuizawa is the better pick in September — 78 vs 66 on SeasonMap's comfort score. Karuizawa is nice, soaked, clean air, while Tokyo is hot, soaked, muggy air.

Karuizawa vs Tokyo — September climate, side by side

	🇯🇵 Karuizawa	🇯🇵 Tokyo
Comfort score	78/100 (B)	66/100 (C)
Feels-like high	23°C	30°C
Avg high / low	21° / 13°	28° / 21°
Rainfall	179 mm	160 mm
Rainy days	21	15
Humidity	87%	82%
Air quality (AQI)	40	68

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

Month by month

Karuizawa 🇯🇵 Japannice, soaked, clean air · best May78
Tokyo 🇯🇵 Japanhot, soaked, muggy air · best May66

Karuizawa vs Tokyo in September — FAQ

Is September better in Karuizawa or Tokyo?: Karuizawa is the better pick in September — 78 vs 66 on SeasonMap's comfort score. Karuizawa is nice, soaked, clean air, while Tokyo is hot, soaked, muggy air.
What is the weather like in Karuizawa vs Tokyo in September?: In September, Karuizawa averages 21°C high / 13°C low with about 179 mm of rain; Tokyo averages 28°C high / 21°C low with about 160 mm.