Weather on September 21 in Warsaw
Historical weather data for September 21 in Warsaw, Poland
Based on 55 years of data from OKECIE
About This Date
September 21st in Warsaw, Poland typically brings mild fall weather, with average highs around 19°C and lows near 8°C. Over 55 years of records, the warmest September 21st was in 2025 (22°C average), while the coldest was 1997 (9°C) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 21st dates historically, with the wettest September 21st recording 1.19" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 21st in Warsaw? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 29°C (84°F) | 16°C (61°F) | 0" |
| 2024 | 24°C (76°F) | -- | 0" |
| 2023 | 27°C (80°F) | -- | 0" |
| 2022 | 13°C (56°F) | 7°C (45°F) | 0.18" |
| 2021 | 13°C (56°F) | -- | -- |
| 2020 | 23°C (74°F) | 2°C (36°F) | 0" |
| 2019 | 15°C (59°F) | 5°C (41°F) | 0" |
| 2018 | 27°C (80°F) | 11°C (51°F) | 0" |
| 2017 | 12°C (54°F) | 11°C (51°F) | 0.43" |
| 2016 | -- | 7°C (44°F) | 0" |
| 2015 | 15°C (59°F) | -- | 0" |
| 2014 | 18°C (65°F) | -- | 0" |
| 2013 | 18°C (65°F) | -- | 0" |
| 2012 | 18°C (64°F) | 3°C (38°F) | 0" |
| 2011 | 21°C (70°F) | 8°C (46°F) | 0" |
| 2010 | 19°C (67°F) | -- | 0.03" |
| 2009 | 24°C (75°F) | -- | 0" |
| 2008 | 12°C (54°F) | 8°C (46°F) | 0.2" |
| 2007 | 18°C (65°F) | 3°C (37°F) | 0" |
| 2006 | 21°C (69°F) | 8°C (47°F) | 0.03" |
| 2005 | 20°C (68°F) | 7°C (45°F) | 0" |
| 2004 | 17°C (63°F) | 11°C (51°F) | 0" |
| 2003 | 28°C (83°F) | 12°C (54°F) | 0" |
| 2002 | 17°C (63°F) | 10°C (50°F) | 0" |
| 2001 | 18°C (64°F) | 9°C (49°F) | -- |
| 2000 | 15°C (59°F) | 4°C (39°F) | -- |
| 1999 | 24°C (76°F) | 16°C (60°F) | 0" |
| 1998 | -- | 8°C (46°F) | 0" |
| 1997 | 14°C (58°F) | 3°C (38°F) | 0" |
| 1996 | 13°C (55°F) | -- | 0" |
| 1995 | 14°C (58°F) | -- | 0.51" |
| 1994 | 13°C (56°F) | 11°C (51°F) | 1.19" |
| 1993 | 17°C (63°F) | 3°C (37°F) | 0" |
| 1992 | 17°C (62°F) | 8°C (46°F) | -- |
| 1991 | 18°C (64°F) | 7°C (44°F) | -- |
| 1990 | -- | 6°C (43°F) | -- |
| 1989 | 24°C (76°F) | 12°C (53°F) | 0" |
| 1988 | 13°C (56°F) | 11°C (51°F) | 0" |
| 1987 | 14°C (58°F) | -- | 0" |
| 1986 | -- | 11°C (52°F) | 0" |
| 1985 | 21°C (69°F) | 13°C (56°F) | 0" |
| 1984 | 21°C (70°F) | 9°C (48°F) | 0" |
| 1983 | 16°C (60°F) | 12°C (53°F) | 0" |
| 1982 | 27°C (80°F) | 12°C (53°F) | 0" |
| 1981 | 26°C (79°F) | 15°C (59°F) | 0" |
| 1980 | 21°C (70°F) | 6°C (43°F) | 0" |
| 1979 | 22°C (72°F) | 12°C (54°F) | 0" |
| 1978 | -- | 2°C (36°F) | 0.05" |
| 1977 | 12°C (54°F) | 8°C (46°F) | 0.71" |
| 1976 | 18°C (64°F) | -- | 0" |
| 1975 | 19°C (66°F) | 11°C (52°F) | 0" |
| 1974 | 17°C (63°F) | 5°C (41°F) | 0.1" |
| 1973 | 23°C (73°F) | 9°C (48°F) | 0" |
| 1972 | 18°C (65°F) | 3°C (38°F) | 0" |
| 1971 | 17°C (62°F) | 9°C (49°F) | 0" |