Click on a day for an hourly weather forecast
The temperatures in Pori in September are usually low and can range between 11°C and 15°C.
You can expect about 3 to 8 days of rain in Pori 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 Pori in September 2025.
If you’re planning to visit Pori in the near future, we highly recommend that you review the 14 day weather forecast for Pori before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -5° | 5 | 9 | 18 | 67 mm | Awful | Pori in January |
| February | -2° / -5° | 3 | 9 | 16 | 52 mm | Awful | Pori in February |
| March | 1° / -3° | 6 | 10 | 15 | 48 mm | Awful | Pori in March |
| April | 5° / 1° | 5 | 20 | 6 | 47 mm | Awful | Pori in April |
| May | 12° / 6° | 6 | 24 | 1 | 64 mm | Ok | Pori in May |
| June | 16° / 10° | 5 | 25 | 0 | 72 mm | Good | Pori in June |
| July | 20° / 14° | 6 | 25 | 0 | 101 mm | Good | Pori in July |
| August | 19° / 14° | 6 | 25 | 0 | 104 mm | Good | Pori in August |
| September | 15° / 11° | 6 | 24 | 0 | 90 mm | Good | Pori in September |
| October | 9° / 6° | 7 | 22 | 2 | 84 mm | Awful | Pori in October |
| November | 5° / 2° | 8 | 17 | 5 | 83 mm | Awful | Pori in November |
| December | 1° / -2° | 7 | 9 | 15 | 79 mm | Awful | Pori in December |