Poland in September: where is it warmest?
In September, Kostrzyn nad Odrą is the warmest place with 20 °C by day, Zakopane the coolest with 15 °C. 38 of 46 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Kostrzyn nad Odrą | 78 | 20° | – | 6 h | 9 |
| Wrocław | 76 | 20° | – | 6 h | 10 |
| Warsaw | 79 | 19° | – | 6 h | 9 |
| Bydgoszcz | 79 | 19° | – | 5 h | 8 |
| Malbork | 78 | 19° | – | 5 h | 8 |
| Poznań | 77 | 19° | – | 6 h | 9 |
| Toruń | 77 | 19° | – | 5 h | 8 |
| Zielona Góra | 77 | 19° | – | 5 h | 9 |
| Gorzów Wielkopolski | 77 | 19° | – | 5 h | 9 |
| Łódź | 76 | 19° | – | 6 h | 10 |
| Przemyśl | 76 | 19° | – | 6 h | 11 |
| Kraków | 75 | 19° | – | 6 h | 11 |
| Opole | 75 | 19° | – | 6 h | 11 |
| Rzeszów | 75 | 19° | – | 6 h | 11 |
| Legnica | 75 | 19° | – | 5 h | 10 |
| Częstochowa | 74 | 19° | – | 6 h | 11 |
| Auschwitz | 73 | 19° | – | 6 h | 11 |
| Gliwice | 73 | 19° | – | 6 h | 11 |
| Zabrze | 73 | 19° | – | 6 h | 11 |
| Katowice | 72 | 19° | – | 5 h | 11 |
| Cieszyn | 72 | 19° | – | 5 h | 12 |
| Bytom | 72 | 19° | – | 5 h | 11 |
| Białystok | 79 | 18° | – | 6 h | 9 |
| Lublin | 79 | 18° | – | 6 h | 10 |
| Szczecin | 77 | 18° | – | 5 h | 9 |
| Gdańsk | 76 | 18° | 17° | 5 h | 9 |
| Elbląg | 76 | 18° | – | 5 h | 10 |
| Kielce | 76 | 18° | – | 6 h | 10 |
| Olsztyn | 74 | 18° | – | 5 h | 9 |
| Chorzów | 73 | 18° | – | 5 h | 11 |
| Bielsko-Biała | 72 | 18° | – | 5 h | 12 |
| Jelenia Góra | 71 | 18° | – | 5 h | 11 |
| Gdynia | 70 | 18° | 17° | 5 h | 11 |
| Słupsk | 70 | 18° | – | 6 h | 12 |
| Sopot | 21 | 18° | 17° | 5 h | 9 |
| Świnoujście | 20 | 18° | 17° | 6 h | 10 |
| Kołobrzeg | 19 | 18° | 17° | 6 h | 11 |
| Międzyzdroje | 19 | 18° | 17° | 6 h | 10 |
| Pobierowo | 19 | 18° | 17° | 6 h | 11 |
| Koszalin | 18 | 18° | 17° | 6 h | 11 |
| Darłowo | 17 | 18° | 17° | 6 h | 12 |
| Suwałki | 74 | 17° | – | 6 h | 9 |
| Świeradów-Zdrój | 71 | 17° | – | 5 h | 11 |
| Wałbrzych | 65 | 17° | – | 5 h | 12 |
| Szklarska Poręba | 64 | 16° | – | 5 h | 13 |
| Zakopane | 57 | 15° | – | 5 h | 12 |
Poland in September: quick answers
Poland in September: where is it warmest?
The warmest places in September are Kostrzyn nad Odrą (20 °C), Wrocław (20 °C) and Warsaw (19 °C).
Poland in September: where is the sea warmest?
The sea is warmest at Gdańsk (17 °C), Gdynia (17 °C) and Sopot (17 °C).
Poland in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Warsaw, Bydgoszcz and Białystok.
Poland month by month
Poland: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences