Weather in Warsaw in September
September in Warsaw is mild enough that walking is the default. This is a city-break month more than a sea-holiday month.
In Poland, this is how Warsaw actually wears September, not how a country centroid would. Compared with July and January, September sits in the middle of Warsaw's year.
- Average temp
- 14°C
10–19°C
- Rainfall
- 50 mm
Showers likely
- Sunshine
- 7.7 h
hours per day
What to expect
Daytime
Mild afternoons in Warsaw are the prize in September. You can eat outside on the good days. You still want something for the breeze.
This is walking weather. Shade is useful, not essential the way it is in the hot months. A long outdoor day is a reasonable plan.
Rain
Mixed skies in Warsaw in September. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.
Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Sun protection
Rain jacket
A layer for cooler evenings
Where to stay in Warsaw
Dates are a starting point for September.
Travel guides for Warsaw
What to read before you book.
Average weather in Warsaw
TemperatureRainfall
Similar weather in September
Other destinations whose September averages sit close to this one.
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FAQs about Warsaw
Climate averages for Warsaw, 1991–2020.
The best time to visit Warsaw is between April and September, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 20°C.
July is the wettest month, with about 83 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
