What is the weather like in Nagano vs Osaka in September?

In September, Nagano averages 27°C high / 18°C low with about 200 mm of rain; Osaka averages 30°C high / 23°C low with about 171 mm.

Nagano vs Osaka in September

Nagano is the better pick in September — 71 vs 61 on SeasonMap's comfort score. Nagano is hot, soaked, clean air, while Osaka is sweltering, soaked, muggy air.

Nagano vs Osaka — September climate, side by side

	🇯🇵 Nagano	🇯🇵 Osaka
Comfort score	71/100 (B)	61/100 (C)
Feels-like high	30°C	34°C
Avg high / low	27° / 18°	30° / 23°
Rainfall	200 mm	171 mm
Rainy days	18	13
Humidity	86%	78%
Air quality (AQI)	33	65

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

Month by month

Nagano 🇯🇵 Japanhot, soaked, clean air · best May71
Osaka 🇯🇵 Japansweltering, soaked, muggy air · best November61

Nagano vs Osaka in September — FAQ

Is September better in Nagano or Osaka?: Nagano is the better pick in September — 71 vs 61 on SeasonMap's comfort score. Nagano is hot, soaked, clean air, while Osaka is sweltering, soaked, muggy air.
What is the weather like in Nagano vs Osaka in September?: In September, Nagano averages 27°C high / 18°C low with about 200 mm of rain; Osaka averages 30°C high / 23°C low with about 171 mm.