Click on a day for an hourly weather forecast
The temperatures in Poznan in September are usually low and can range between 12°C and 20°C.
You can expect about 3 to 8 days of rain in Poznan 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 Poznan in September 2025.
If you’re planning to visit Poznan in the near future, we highly recommend that you review the 14 day weather forecast for Poznan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -3° | 7 | 9 | 15 | 61 mm | Awful | Poznan in January |
| February | 3° / -2° | 6 | 12 | 11 | 44 mm | Awful | Poznan in February |
| March | 8° / 1° | 6 | 20 | 5 | 47 mm | Bad | Poznan in March |
| April | 15° / 5° | 3 | 25 | 2 | 38 mm | Ok | Poznan in April |
| May | 19° / 9° | 6 | 25 | 0 | 82 mm | Good | Poznan in May |
| June | 23° / 13° | 6 | 24 | 0 | 92 mm | Perfect | Poznan in June |
| July | 25° / 15° | 6 | 25 | 0 | 113 mm | Perfect | Poznan in July |
| August | 25° / 15° | 5 | 26 | 0 | 80 mm | Perfect | Poznan in August |
| September | 20° / 12° | 4 | 26 | 0 | 57 mm | Good | Poznan in September |
| October | 14° / 7° | 5 | 26 | 0 | 52 mm | Good | Poznan in October |
| November | 8° / 3° | 7 | 21 | 3 | 53 mm | Awful | Poznan in November |
| December | 3° / -1° | 8 | 14 | 9 | 52 mm | Awful | Poznan in December |