Click on a day for an hourly weather forecast
The temperatures in Vastervik in September are usually low and can range between 11°C and 17°C.
You can expect about 3 to 8 days of rain in Vastervik 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 Vastervik in September 2026.
If you’re planning to visit Vastervik in the near future, we highly recommend that you review the 14 day weather forecast for Vastervik before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -2° | 4 | 12 | 15 | 39 mm | Awful | Vastervik in January |
| February | 2° / -2° | 4 | 11 | 13 | 36 mm | Awful | Vastervik in February |
| March | 5° / 0° | 4 | 18 | 9 | 28 mm | Awful | Vastervik in March |
| April | 10° / 3° | 3 | 25 | 3 | 22 mm | Bad | Vastervik in April |
| May | 15° / 7° | 4 | 27 | 1 | 38 mm | Good | Vastervik in May |
| June | 19° / 11° | 5 | 25 | 0 | 62 mm | Good | Vastervik in June |
| July | 22° / 14° | 5 | 26 | 0 | 64 mm | Good | Vastervik in July |
| August | 21° / 13° | 5 | 26 | 0 | 70 mm | Good | Vastervik in August |
| September | 17° / 11° | 4 | 26 | 0 | 35 mm | Good | Vastervik in September |
| October | 11° / 6° | 5 | 25 | 1 | 48 mm | Ok | Vastervik in October |
| November | 6° / 3° | 5 | 21 | 4 | 56 mm | Awful | Vastervik in November |
| December | 2° / -1° | 6 | 15 | 11 | 39 mm | Awful | Vastervik in December |