Click on a day for an hourly weather forecast
The temperatures in Savonlinna in September are quite cold with temperatures between 9°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Savonlinna 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 Savonlinna in September 2026.
If you’re planning to visit Savonlinna in the near future, we highly recommend that you review the 14 day weather forecast for Savonlinna before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -10° | 3 | 5 | 24 | 56 mm | Awful | Savonlinna in January |
| February | -5° / -9° | 2 | 3 | 24 | 55 mm | Awful | Savonlinna in February |
| March | -1° / -6° | 4 | 6 | 22 | 50 mm | Awful | Savonlinna in March |
| April | 5° / -1° | 5 | 13 | 12 | 52 mm | Awful | Savonlinna in April |
| May | 13° / 6° | 6 | 23 | 2 | 68 mm | Bad | Savonlinna in May |
| June | 18° / 10° | 7 | 23 | 0 | 85 mm | Ok | Savonlinna in June |
| July | 22° / 14° | 6 | 25 | 0 | 89 mm | Good | Savonlinna in July |
| August | 20° / 12° | 7 | 24 | 0 | 106 mm | Ok | Savonlinna in August |
| September | 14° / 9° | 6 | 24 | 0 | 85 mm | Good | Savonlinna in September |
| October | 6° / 3° | 7 | 17 | 7 | 81 mm | Awful | Savonlinna in October |
| November | 2° / -1° | 7 | 11 | 13 | 73 mm | Awful | Savonlinna in November |
| December | -2° / -5° | 4 | 5 | 23 | 66 mm | Awful | Savonlinna in December |