The weather in Niseko in December is very cold with temperatures between -6°C and -2°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Niseko during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Niseko to be covered in white during the month of December. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Niseko in December 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
-2° / -6°
Rainy Days
6
Snowy Days
28
Dry Days
1
Rainfall
250
mm
Sun Hours
0.7
Hrs
