Weather on September 11 at Gateway Arch
Gateway Arch National Park
Based on 52 years of data from St. Louis, MO
Planning Your Visit
September 11th in Gateway Arch National Park (via St. Louis, MO) typically brings warm fall weather, with average highs around 83°F and lows near 60°F. Over 52 years of records, the warmest September 11th was in 2013 (87°F average), while the coldest was 1976 (59°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 17% of September 11th dates historically, with the wettest September 11th recording 1.75" 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 11th in Gateway Arch? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 91°F | 57°F | 0" | 0" |
| 2024 | 91°F | 52°F | 0" | 0" |
| 2023 | 78°F | 58°F | 0.08" | 0" |
| 2022 | 74°F | 52°F | 0.05" | 0" |
| 2021 | 87°F | 63°F | 0" | 0" |
| 2020 | 86°F | 70°F | 0" | 0" |
| 2019 | 91°F | 71°F | 0" | 0" |
| 2018 | 83°F | 57°F | 0" | 0" |
| 2017 | 80°F | 47°F | 0" | 0" |
| 2016 | 78°F | 65°F | 0" | 0" |
| 2015 | 84°F | 65°F | 0.25" | -- |
| 2014 | 87°F | 58°F | 1.75" | 0" |
| 2013 | 100°F | 73°F | 0" | 0" |
| 2012 | 80°F | 59°F | 0" | 0" |
| 2011 | 74°F | 59°F | 0" | -- |
| 2010 | 68°F | 61°F | 1.63" | 0" |
| 2009 | 82°F | 61°F | 0" | 0" |
| 2008 | 77°F | 57°F | 0" | 0" |
| 2007 | 86°F | 59°F | 0.03" | 0" |
| 2006 | 85°F | 64°F | 0.36" | 0" |
| 2005 | 92°F | 67°F | 0" | 0" |
| 2004 | 83°F | 55°F | 0" | 0" |
| 2003 | 87°F | 66°F | 0" | 0" |
| 2002 | 92°F | 67°F | 0" | 0" |
| 2001 | 77°F | 53°F | 0" | 0" |
| 2000 | 85°F | 72°F | 0.13" | 0" |
| 1999 | 86°F | 60°F | 0" | 0" |
| 1998 | 78°F | 51°F | 0" | 0" |
| 1997 | 74°F | 50°F | 0" | 0" |
| 1996 | 81°F | 59°F | 0" | 0" |
| 1995 | 77°F | 53°F | 0" | 0" |
| 1994 | 86°F | 58°F | 0" | 0" |
| 1993 | 75°F | 50°F | 0" | 0" |
| 1992 | 75°F | 49°F | 0" | 0" |
| 1991 | 91°F | 74°F | 0" | 0" |
| 1990 | 85°F | 71°F | 0" | 0" |
| 1989 | 71°F | 54°F | 0" | 0" |
| 1988 | 86°F | 69°F | 0" | 0" |
| 1987 | 84°F | 54°F | 0" | 0" |
| 1985 | 76°F | 51°F | 0" | 0" |
| 1982 | 87°F | 64°F | 0" | 0" |
| 1981 | 86°F | 60°F | 0" | 0" |
| 1980 | 80°F | 50°F | 0" | 0" |
| 1979 | 90°F | 57°F | 0" | 0" |
| 1978 | 93°F | 63°F | 0" | 0" |
| 1977 | 79°F | 50°F | 0" | 0" |
| 1976 | 76°F | 43°F | 0" | 0" |
| 1975 | 86°F | 69°F | 0.58" | 0" |
| 1974 | 82°F | 67°F | 0" | 0" |
| 1973 | 78°F | 63°F | 0" | 0" |
| 1972 | 93°F | 68°F | 0" | 0" |
| 1971 | 91°F | -- | 0" | 0" |