Weather on September 20 in Warsaw
Historical weather data for September 20 in Warsaw, Poland
Based on 55 years of data from OKECIE
About This Date
September 20th in Warsaw, Poland typically brings mild fall weather, with average highs around 18°C and lows near 7°C. Over 55 years of records, the warmest September 20th was in 2025 (20°C average), while the coldest was 1987 (7°C) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 20th dates historically, with the wettest September 20th recording 1.14" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Warsaw? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 27°C (80°F) | 13°C (56°F) | -- |
| 2024 | 23°C (74°F) | -- | 0" |
| 2023 | 23°C (74°F) | 8°C (47°F) | 0.51" |
| 2022 | 16°C (60°F) | 8°C (47°F) | -- |
| 2021 | 9°C (48°F) | -- | 0" |
| 2020 | -- | 5°C (41°F) | 0" |
| 2019 | 13°C (55°F) | 3°C (37°F) | 0" |
| 2018 | 28°C (83°F) | 11°C (51°F) | 0" |
| 2017 | 14°C (58°F) | 12°C (53°F) | 0.05" |
| 2016 | 13°C (56°F) | -1°C (31°F) | 0" |
| 2015 | 16°C (61°F) | 9°C (49°F) | 0" |
| 2014 | 21°C (69°F) | -- | 0" |
| 2013 | 16°C (61°F) | 8°C (46°F) | 0" |
| 2012 | 13°C (56°F) | -- | 0" |
| 2011 | 18°C (65°F) | -- | 0" |
| 2010 | -- | 3°C (38°F) | 0" |
| 2009 | 21°C (69°F) | -- | 0" |
| 2008 | 11°C (51°F) | 8°C (46°F) | 0.79" |
| 2007 | -- | 2°C (35°F) | 0" |
| 2006 | 21°C (70°F) | -- | 1.14" |
| 2005 | 19°C (66°F) | 4°C (39°F) | 0" |
| 2004 | 21°C (70°F) | 6°C (43°F) | 0" |
| 2003 | 23°C (74°F) | 11°C (52°F) | 0" |
| 2002 | 18°C (65°F) | 3°C (38°F) | 0.05" |
| 2001 | 18°C (64°F) | 7°C (44°F) | -- |
| 2000 | 12°C (54°F) | -- | -- |
| 1999 | 23°C (73°F) | -- | 0" |
| 1998 | -- | 7°C (45°F) | 0" |
| 1997 | 15°C (59°F) | 3°C (38°F) | -- |
| 1996 | 13°C (55°F) | 6°C (42°F) | -- |
| 1995 | 17°C (62°F) | 8°C (47°F) | -- |
| 1994 | -- | 11°C (51°F) | 0.25" |
| 1993 | -- | 3°C (37°F) | -- |
| 1992 | 17°C (63°F) | -- | 0" |
| 1991 | -- | 8°C (47°F) | 0.2" |
| 1990 | 14°C (57°F) | -- | 0.33" |
| 1989 | -- | 13°C (55°F) | 0" |
| 1988 | -- | 12°C (54°F) | 0.1" |
| 1987 | 10°C (50°F) | 3°C (37°F) | -- |
| 1986 | -- | 6°C (43°F) | -- |
| 1985 | 22°C (71°F) | 11°C (51°F) | 0" |
| 1984 | 18°C (64°F) | -- | 0" |
| 1983 | 21°C (70°F) | 11°C (51°F) | 0" |
| 1982 | 27°C (80°F) | -- | 0" |
| 1981 | 18°C (64°F) | 10°C (50°F) | 0.3" |
| 1980 | 19°C (66°F) | 3°C (37°F) | 0" |
| 1979 | 24°C (75°F) | 14°C (57°F) | 0" |
| 1978 | 12°C (54°F) | 3°C (37°F) | 0" |
| 1977 | 14°C (57°F) | 7°C (45°F) | 0" |
| 1976 | 13°C (55°F) | 7°C (45°F) | 0" |
| 1975 | 26°C (79°F) | 10°C (50°F) | 0" |
| 1974 | -- | 2°C (36°F) | 0.2" |
| 1973 | 21°C (70°F) | -- | -- |
| 1972 | 16°C (60°F) | 6°C (42°F) | 0" |
| 1971 | 16°C (61°F) | 8°C (46°F) | 0" |