Click on a day for an hourly weather forecast
The temperatures in Asker in September are quite cold with temperatures between 8°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Asker 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 Asker in September 2026.
If you’re planning to visit Asker in the near future, we highly recommend that you review the 14 day weather forecast for Asker before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 3 | 13 | 15 | 51 mm | Awful | Asker in January |
| February | -1° / -8° | 4 | 11 | 14 | 45 mm | Awful | Asker in February |
| March | 3° / -5° | 6 | 16 | 10 | 46 mm | Awful | Asker in March |
| April | 10° / 2° | 4 | 23 | 3 | 39 mm | Bad | Asker in April |
| May | 15° / 5° | 7 | 23 | 1 | 85 mm | Ok | Asker in May |
| June | 19° / 9° | 6 | 24 | 0 | 83 mm | Good | Asker in June |
| July | 21° / 11° | 6 | 25 | 0 | 93 mm | Good | Asker in July |
| August | 20° / 11° | 7 | 24 | 0 | 88 mm | Ok | Asker in August |
| September | 16° / 8° | 5 | 25 | 0 | 66 mm | Good | Asker in September |
| October | 10° / 4° | 7 | 24 | 1 | 64 mm | Bad | Asker in October |
| November | 4° / 0° | 6 | 18 | 6 | 65 mm | Awful | Asker in November |
| December | -1° / -5° | 6 | 14 | 11 | 58 mm | Awful | Asker in December |