Weather on September 30 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
September 30th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 78°F and lows near 52°F — a 26°F daily swing. Over 53 years of records, the warmest September 30th was in 2019 (79°F average), while the coldest was 1972 (51°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 30th dates historically, with the wettest September 30th recording 2.51" of rain. The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
Planning for September 30th in Gateway Arch? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 90°F | 56°F | 0" | 0" |
| 2024 | 82°F | 63°F | 0" | 0" |
| 2023 | 91°F | 61°F | 0" | 0" |
| 2022 | 73°F | 39°F | 0" | 0" |
| 2021 | 86°F | 62°F | 0" | 0" |
| 2020 | 83°F | 45°F | 0" | 0" |
| 2019 | 92°F | 67°F | 0" | -- |
| 2018 | 84°F | 53°F | 0" | 0" |
| 2017 | 80°F | 59°F | 0" | 0" |
| 2016 | 68°F | 57°F | 0.03" | 0" |
| 2015 | 78°F | 57°F | 0.48" | 0" |
| 2014 | 86°F | 61°F | 0" | 0" |
| 2013 | 75°F | 53°F | 0" | 0" |
| 2012 | 76°F | 54°F | 0" | 0" |
| 2011 | 85°F | 57°F | 0" | -- |
| 2010 | 78°F | 53°F | 0" | 0" |
| 2009 | 65°F | 44°F | 0" | 0" |
| 2008 | 75°F | 55°F | 0.64" | 0" |
| 2007 | 84°F | 52°F | 0" | 0" |
| 2006 | 66°F | 46°F | 0.03" | 0" |
| 2005 | 65°F | 42°F | 0" | 0" |
| 2004 | 69°F | 44°F | 0" | 0" |
| 2003 | 65°F | 50°F | 0" | 0" |
| 2002 | 84°F | 55°F | 0" | 0" |
| 2001 | 69°F | 44°F | 0" | 0" |
| 2000 | 76°F | 47°F | 0" | 0" |
| 1999 | 67°F | 39°F | 0" | 0" |
| 1998 | 89°F | 65°F | 0" | 0" |
| 1997 | 83°F | 58°F | 0" | 0" |
| 1996 | 75°F | 47°F | 0" | 0" |
| 1995 | 86°F | 62°F | 0" | 0" |
| 1994 | 90°F | 54°F | 0" | 0" |
| 1993 | 65°F | 41°F | 0" | 0" |
| 1992 | 71°F | 38°F | 0" | 0" |
| 1991 | 82°F | 54°F | 0" | 0" |
| 1990 | 71°F | 44°F | 0" | 0" |
| 1989 | 79°F | 60°F | 0" | 0" |
| 1988 | 81°F | 64°F | 0" | 0" |
| 1987 | 76°F | 48°F | 0" | 0" |
| 1986 | 75°F | 63°F | 2.51" | 0" |
| 1985 | 69°F | 32°F | 0.15" | 0" |
| 1982 | 87°F | 52°F | 0" | 0" |
| 1981 | 87°F | 61°F | 0" | 0" |
| 1980 | 80°F | 44°F | 0" | 0" |
| 1979 | 90°F | 55°F | 0" | 0" |
| 1978 | 84°F | 56°F | 0.2" | 0" |
| 1977 | 71°F | 58°F | 0" | 0" |
| 1976 | 73°F | 49°F | 0" | 0" |
| 1975 | 73°F | 52°F | 0" | 0" |
| 1974 | 69°F | 48°F | 0" | 0" |
| 1973 | 77°F | 56°F | 0" | 0" |
| 1972 | 61°F | 42°F | 0.3" | 0" |
| 1971 | 91°F | -- | 0" | 0" |