Weather in Warsaw in September
September in Warsaw is cool with average temperatures around 14.9°C (58.8°F). Moderate rainfall of 52mm spread over 10 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
20.3°C
68.5°F
Low
9.6°C
49.3°F
Precipitation
52 mm
2.0 inches
~10 rainy days
Conditions
Humidity
72%
Comparison to Adjacent Months
September is 5.1°C cooler than August.
September is 6.0°C warmer than October.