Saku Weather in September
What's the weather like in Saku (Nagano) in September 2025?
The climate in Saku during September can be summarized as warm and wet.
September is in the fall / autumn in Saku and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 14°C (58°F) is normal.
| Daytime temperature | 23.1°C 73.6°F |
|---|---|
| Nightly temperature | 14.3°C 57.7°F |
| Average temperature | 18.7°C 65.7°F |
| Daily sunshine | 4.3 hrs |
| Avg rainfall | 166 mm 6.5 ins |
| Rainy days | 19 days |
| Sea temperature | 24.5°C 76.1°F |
| Humidity | 82% |
| Windspeed | 6.5kph 4 mph |
On average September is the 3rd wettest month of the year in Saku with around 166mm 6.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.3 hours of sunshine per day.
September temperatures in Saku
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Saku in September 2025.
Other monthly averages
Best places to visit in September
Saku weather stats
| Hottest month: | August | 28.1°C 82.6°F |
|---|---|---|
| Driest month: | December | 24mm 0.9ins |
| Sunniest month: | January | 6.1hrs |
| Coldest month: | January | 3.2°C 37.8°F |
| Wettest month: | July | 177mm 7ins |
© Google
Locations nearby
Top Japan locations
- Fukuoka
- Hakodate
- Hakone
- Hiroshima
- Kagoshima
- Kamakura
- Kanazawa
- Kōbe
- Kyoto
- Nagoya
- Naha
- Nara
- Nikkō
- Ōsaka
- Sapporo
- Sendai
- Takayama
- Tokyo
- Yokohama