Weather on September 19 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
September 19th in Gateway Arch National Park (via St. Louis, MO) typically brings warm fall weather, with average highs around 82°F and lows near 57°F — a 25°F daily swing. Over 53 years of records, the warmest September 19th was in 1972 (89°F average), while the coldest was 1991 (49°F) — a 40°F range across recorded history. Rain or other precipitation has occurred on about 30% of September 19th dates historically, with the wettest September 19th recording 2.9" of rain. The last decade has been 5.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.6°F warmer on this date compared to 20-30 years ago.
Planning for September 19th in Gateway Arch? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 64°F | 0.08" | 0" |
| 2024 | 91°F | 58°F | 0" | 0" |
| 2023 | 86°F | 54°F | 0" | 0" |
| 2022 | 96°F | 70°F | 0" | -- |
| 2021 | 87°F | 63°F | 0.51" | 0" |
| 2020 | 73°F | 44°F | 0" | 0" |
| 2019 | 91°F | 62°F | 0" | 0" |
| 2018 | 92°F | 71°F | 0.13" | 0" |
| 2017 | 92°F | 65°F | 0.03" | 0" |
| 2016 | 88°F | 57°F | 0" | 0" |
| 2015 | 92°F | 64°F | 0.08" | 0" |
| 2014 | 75°F | 56°F | 0" | 0" |
| 2013 | 89°F | 73°F | 0.86" | 0" |
| 2012 | 69°F | 48°F | 0" | 0" |
| 2011 | 65°F | 59°F | 2.82" | -- |
| 2010 | 90°F | 62°F | 1.42" | 0" |
| 2009 | 79°F | 57°F | 0" | 0" |
| 2008 | 81°F | 58°F | 0" | 0" |
| 2007 | 89°F | 62°F | 0" | 0" |
| 2006 | 74°F | 48°F | 0" | 0" |
| 2005 | 80°F | 61°F | 0" | 0" |
| 2004 | 81°F | 54°F | 0" | 0" |
| 2003 | 85°F | 54°F | 0" | 0" |
| 2002 | 82°F | 68°F | 0" | 0" |
| 2001 | 71°F | 53°F | 0" | -- |
| 2000 | 86°F | 53°F | 0" | 0" |
| 1999 | 79°F | 53°F | 0.05" | 0" |
| 1998 | 82°F | 64°F | 0" | 0" |
| 1997 | 85°F | 64°F | 0" | 0" |
| 1996 | 72°F | 50°F | 0" | 0" |
| 1995 | 74°F | 53°F | 0.38" | 0" |
| 1994 | 82°F | 51°F | 0" | 0" |
| 1993 | 76°F | 56°F | 0.18" | 0" |
| 1992 | 75°F | 51°F | 0" | 0" |
| 1991 | 59°F | 39°F | 0" | 0" |
| 1990 | 73°F | 58°F | 0.2" | 0" |
| 1989 | 82°F | 48°F | 0" | 0" |
| 1988 | 85°F | 57°F | 1.88" | 0" |
| 1987 | 80°F | 45°F | 0" | 0" |
| 1986 | 90°F | 66°F | 0" | 0" |
| 1985 | 87°F | 54°F | 0" | 0" |
| 1982 | 74°F | 50°F | 0" | 0" |
| 1981 | 67°F | 44°F | 0" | 0" |
| 1980 | 78°F | 45°F | 0" | 0" |
| 1979 | 88°F | 48°F | 0" | 0" |
| 1978 | 94°F | 69°F | 0" | 0" |
| 1977 | 85°F | 60°F | 2.9" | 0" |
| 1976 | 89°F | 59°F | 0" | 0" |
| 1975 | 83°F | 62°F | 1.65" | 0" |
| 1974 | 85°F | 60°F | 0" | 0" |
| 1973 | 67°F | 41°F | 0" | 0" |
| 1972 | 100°F | 77°F | 0" | 0" |
| 1971 | 75°F | -- | 2.51" | 0" |