Warsaw Weather in September
In September, Warsaw averages a high of 19°C (66°F) and a low of 9°C (47°F), from 39 years of daily records (1973–2025).
19°C
Average high
66°F
9°C
Average low
47°F
31°C
Record high
88°F · September 3, 2024
-2°C
Record low
28°F · September 28, 1977
What September Is Like in Warsaw
- September 2024 was the warmest September in 39 years of records, 5.6°C (10.1°F) above the long-run average.
- Warsaw's hottest September day on record is a recent one: 31°C (88°F) on September 3, 2024.
- The coldest September reading, -2°C (28°F) on September 28, 1977, has not been matched in 48 years.
- The warmest September in the record was 2024; the coldest was 1996.
At least 1 mm of rain falls on 25% of September days, and the month averages 37 mm in total.
Warmest: 2024 (24.5°C)Latest: 2024 (24.5°C)10-year averageLong-run average (18.5°C)
Look Up a Day in September
See the weather in Warsaw on any September date, year by year.
Source: NOAA GHCN-Daily, Okecie (1973–2025). Averages cover 1973–2025. How we compute this