Click on a day for an hourly weather forecast
The temperatures in Vasteras in September are quite cold with temperatures between 9°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Vasteras 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 Vasteras in September 2025.
If you’re planning to visit Vasteras in the near future, we highly recommend that you review the 14 day weather forecast for Vasteras before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -5° | 4 | 10 | 17 | 32 mm | Awful | Vasteras in January |
| February | 0° / -5° | 4 | 11 | 14 | 28 mm | Awful | Vasteras in February |
| March | 4° / -2° | 5 | 15 | 11 | 26 mm | Awful | Vasteras in March |
| April | 10° / 2° | 4 | 22 | 4 | 30 mm | Bad | Vasteras in April |
| May | 15° / 6° | 5 | 25 | 1 | 50 mm | Good | Vasteras in May |
| June | 19° / 10° | 4 | 26 | 0 | 60 mm | Good | Vasteras in June |
| July | 22° / 13° | 5 | 26 | 0 | 75 mm | Good | Vasteras in July |
| August | 21° / 12° | 4 | 27 | 0 | 60 mm | Good | Vasteras in August |
| September | 16° / 9° | 3 | 27 | 0 | 37 mm | Good | Vasteras in September |
| October | 10° / 5° | 5 | 25 | 1 | 44 mm | Ok | Vasteras in October |
| November | 5° / 1° | 5 | 20 | 5 | 36 mm | Awful | Vasteras in November |
| December | 0° / -3° | 5 | 13 | 13 | 32 mm | Awful | Vasteras in December |