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The temperatures in Western Finland in September are usually low and can range between 10°C and 15°C.
You can expect about 3 to 8 days of rain in Western Finland 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 Western Finland in September 2025.
If you’re planning to visit Western Finland in the near future, we highly recommend that you review the 14 day weather forecast for Western Finland before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -6° | 6 | 7 | 18 | 66 mm | Awful | Western Finland in January |
| February | -2° / -6° | 5 | 6 | 18 | 52 mm | Awful | Western Finland in February |
| March | 1° / -3° | 6 | 9 | 15 | 51 mm | Awful | Western Finland in March |
| April | 7° / 1° | 6 | 18 | 6 | 41 mm | Bad | Western Finland in April |
| May | 13° / 6° | 5 | 25 | 1 | 61 mm | Ok | Western Finland in May |
| June | 17° / 10° | 6 | 24 | 0 | 63 mm | Good | Western Finland in June |
| July | 21° / 14° | 6 | 25 | 0 | 89 mm | Good | Western Finland in July |
| August | 20° / 14° | 5 | 26 | 0 | 94 mm | Good | Western Finland in August |
| September | 15° / 10° | 5 | 25 | 0 | 76 mm | Good | Western Finland in September |
| October | 9° / 5° | 7 | 21 | 3 | 83 mm | Awful | Western Finland in October |
| November | 5° / 2° | 7 | 17 | 6 | 71 mm | Awful | Western Finland in November |
| December | 1° / -2° | 8 | 9 | 14 | 80 mm | Awful | Western Finland in December |
For a more accurate weather forecast please select a city