The temperatures in Niseko in August are comfortable with low of 16°C and and high up to 23°C.
You can expect rain for roughly half of the month of August in Niseko. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Niseko in August 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
23° / 16°
Rainy Days
9
Snowy Days
0
Dry Days
22
Rainfall
225
mm
Sun Hours
5.0
Hrs
