Weather on September 22 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
September 22nd in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 77°F and lows near 55°F. Over 53 years of records, the warmest September 22nd was in 1980 (82°F average), while the coldest was 1995 (47°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 30% of September 22nd dates historically, with the wettest September 22nd recording 6.02" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for September 22nd in Gateway Arch? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 81°F | 66°F | 1.37" | 0" |
| 2024 | 83°F | 70°F | 6.02" | 0" |
| 2023 | 87°F | 65°F | 1.45" | 0" |
| 2022 | 73°F | 52°F | 0.03" | 0" |
| 2021 | 71°F | 48°F | 0" | 0" |
| 2020 | 77°F | 48°F | 0" | 0" |
| 2019 | 88°F | 67°F | 0.43" | 0" |
| 2018 | 71°F | 56°F | 0" | 0" |
| 2017 | -- | 71°F | 0" | 0" |
| 2016 | 90°F | 67°F | 0" | 0" |
| 2015 | 78°F | 52°F | 0" | 0" |
| 2014 | 75°F | 48°F | 0" | 0" |
| 2013 | 73°F | 51°F | 0" | 0" |
| 2012 | 83°F | 53°F | 0" | 0" |
| 2011 | 78°F | 56°F | 0" | -- |
| 2010 | 91°F | 67°F | 0" | 0" |
| 2009 | 81°F | 64°F | 2.11" | 0" |
| 2008 | 76°F | 58°F | 0" | 0" |
| 2007 | 91°F | 63°F | 0" | 0" |
| 2006 | 70°F | 53°F | 0" | 0" |
| 2005 | 87°F | 59°F | 0" | 0" |
| 2004 | 80°F | 50°F | 0" | 0" |
| 2003 | 77°F | 62°F | 0.03" | 0" |
| 2002 | 81°F | 58°F | 0" | 0" |
| 2001 | 79°F | 53°F | 0" | 0" |
| 2000 | 67°F | 51°F | 0" | 0" |
| 1999 | 65°F | 40°F | 0" | 0" |
| 1998 | 80°F | 62°F | 0.25" | 0" |
| 1997 | 71°F | 52°F | 0" | 0" |
| 1996 | 79°F | 50°F | 0" | 0" |
| 1995 | 56°F | 38°F | 0" | 0" |
| 1994 | 78°F | 54°F | 1.14" | 0" |
| 1993 | 77°F | 64°F | 1.24" | 0" |
| 1992 | 76°F | 55°F | 0.05" | 0" |
| 1991 | 69°F | 47°F | 3.43" | 0" |
| 1990 | 76°F | 46°F | 0" | 0" |
| 1989 | 80°F | 40°F | 0" | 0" |
| 1988 | 94°F | 63°F | 0" | 0" |
| 1987 | 76°F | 50°F | 0" | 0" |
| 1986 | 87°F | 65°F | 0" | 0" |
| 1985 | 89°F | 58°F | 0.08" | 0" |
| 1982 | 65°F | 40°F | 0" | 0" |
| 1981 | 86°F | 54°F | 0" | 0" |
| 1980 | 93°F | 72°F | 0" | 0" |
| 1979 | -- | 50°F | 0" | 0" |
| 1978 | 65°F | 52°F | 0.08" | 0" |
| 1977 | 69°F | 50°F | 0.05" | 0" |
| 1976 | 74°F | 41°F | 0" | 0" |
| 1975 | 61°F | 42°F | 0" | 0" |
| 1974 | 74°F | 41°F | 0" | 0" |
| 1973 | 84°F | 63°F | 0.2" | 0" |
| 1972 | 70°F | 52°F | 0" | 0" |
| 1971 | 68°F | -- | 0" | 0" |