Warsaw Weather in September

Warsaw sits on the Vistula River plain in central Poland, fully exposed to continental weather extremes. The city has some of Europe's greatest seasonal temperature swings — winters regularly hit -4°F while summers peak at 95°F. The Vistula valley channels cold northeasterly winds in winter that make apparent temperatures far colder than the thermometer suggests. Warsaw's position between Atlantic and Siberian air masses means rapid weather changes; the city can experience four seasons in a single day. The Vistula River moderates temperatures slightly in its valley, while western plateau districts are more exposed.

Excellent shoulder season — warm with fewer tourists in many destinations.

Warsaw has a typical Eastern European continental climate. Winters are cold and grey; summers are warm and increasingly sunny. The city sits in the flat Polish Plain with no geographic barriers to arctic air masses in winter or Mediterranean warmth in summer.

• ✓Heavy winter coat and layers December–March
• ✓Waterproof boots October–April
• ✓Sunscreen for summer
• ✓Umbrella year-round