Click on a day for an hourly weather forecast
The temperatures in Sapporo in September are usually low and can range between 13°C and 20°C.
You can expect about 3 to 8 days of rain in Sapporo 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 Sapporo in September 2025.
If you’re planning to visit Sapporo in the near future, we highly recommend that you review the 14 day weather forecast for Sapporo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -10° | 6 | 1 | 30 | 157 mm | Awful | Sapporo in January |
| February | -4° / -10° | 6 | 1 | 26 | 124 mm | Awful | Sapporo in February |
| March | 1° / -6° | 10 | 3 | 22 | 133 mm | Awful | Sapporo in March |
| April | 9° / 1° | 9 | 15 | 7 | 106 mm | Awful | Sapporo in April |
| May | 16° / 7° | 8 | 23 | 0 | 126 mm | Ok | Sapporo in May |
| June | 20° / 11° | 8 | 22 | 0 | 147 mm | Ok | Sapporo in June |
| July | 24° / 16° | 9 | 22 | 0 | 210 mm | Good | Sapporo in July |
| August | 24° / 16° | 9 | 22 | 0 | 239 mm | Good | Sapporo in August |
| September | 20° / 13° | 7 | 23 | 0 | 199 mm | Ok | Sapporo in September |
| October | 13° / 6° | 6 | 24 | 1 | 145 mm | Ok | Sapporo in October |
| November | 5° / 0° | 10 | 7 | 13 | 177 mm | Awful | Sapporo in November |
| December | -2° / -6° | 8 | 2 | 26 | 172 mm | Awful | Sapporo in December |