The temperatures in Niseko in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Niseko during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Niseko in September 2025.
If you’re planning to visit Niseko in the near future, we highly recommend that you review the 14 day weather forecast for Niseko before you arrive.
Temperatures
19° / 12°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
189
mm
Sun Hours
5.8
Hrs
