Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -9° | 4 | 1 | 30 | 192 mm | Awful | Niseko in January |
| February | -4° / -9° | 3 | 1 | 26 | 163 mm | Awful | Niseko in February |
| March | 1° / -5° | 9 | 2 | 24 | 150 mm | Awful | Niseko in March |
| April | 8° / 1° | 9 | 13 | 9 | 119 mm | Awful | Niseko in April |
| May | 15° / 6° | 8 | 22 | 1 | 138 mm | Ok | Niseko in May |
| June | 19° / 11° | 8 | 22 | 0 | 163 mm | Ok | Niseko in June |
| July | 23° / 15° | 9 | 22 | 0 | 193 mm | Good | Niseko in July |
| August | 23° / 16° | 9 | 22 | 0 | 225 mm | Good | Niseko in August |
| September | 19° / 12° | 7 | 23 | 0 | 189 mm | Ok | Niseko in September |
| October | 12° / 6° | 8 | 22 | 1 | 158 mm | Bad | Niseko in October |
| November | 5° / 0° | 10 | 7 | 14 | 223 mm | Awful | Niseko in November |
| December | -2° / -6° | 6 | 1 | 28 | 250 mm | Awful | Niseko in December |