Click on a day for an hourly weather forecast
The temperatures in Imatra in September are quite cold with temperatures between 8°C and 15°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Imatra 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 Imatra in September 2026.
If you’re planning to visit Imatra in the near future, we highly recommend that you review the 14 day weather forecast for Imatra before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -5° / -9° | 3 | 5 | 23 | 68 mm | Awful | Imatra in January |
| February | -4° / -8° | 3 | 3 | 23 | 72 mm | Awful | Imatra in February |
| March | 0° / -5° | 5 | 7 | 20 | 60 mm | Awful | Imatra in March |
| April | 6° / 0° | 6 | 14 | 9 | 62 mm | Awful | Imatra in April |
| May | 15° / 6° | 6 | 23 | 2 | 69 mm | Ok | Imatra in May |
| June | 20° / 10° | 6 | 24 | 0 | 89 mm | Good | Imatra in June |
| July | 23° / 13° | 5 | 26 | 0 | 86 mm | Perfect | Imatra in July |
| August | 21° / 12° | 6 | 25 | 0 | 95 mm | Good | Imatra in August |
| September | 15° / 8° | 5 | 25 | 0 | 82 mm | Good | Imatra in September |
| October | 7° / 3° | 8 | 19 | 4 | 89 mm | Awful | Imatra in October |
| November | 2° / 0° | 7 | 12 | 11 | 76 mm | Awful | Imatra in November |
| December | -2° / -5° | 5 | 5 | 22 | 78 mm | Awful | Imatra in December |