14 cities with 30-year climate records.
| City | Climate | Best time to visit |
|---|---|---|
| Gdańsk | May–September | |
| Szczecin | May–September | |
| Białystok | May–September | |
| Bielsko-Biala | June–August | |
| Elbląg | May–September | |
| Zielona Góra | May–September | |
| Gorzów Wielkopolski | May–September | |
| Słupsk | June–August | |
| Siedlce | May–September | |
| Stargard | May–September | |
| Wrzeszcz | May–September | |
| Chełm | May–September | |
| Tczew | May–September | |
| Biała Podlaska | May–September |