Weather on October 9 at Gateway Arch
Gateway Arch National Park
Based on 51 years of data from St. Louis, MO
Planning Your Visit
October 9th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 73°F and lows near 48°F — a 25°F daily swing. Over 51 years of records, the warmest October 9th was in 2018 (78°F average), while the coldest was 2000 (40°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 24% of October 9th dates historically, with the wettest October 9th recording 5.84" of rain. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for October 9th in Gateway Arch? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 75°F | 44°F | 0" | 0" |
| 2024 | 79°F | 42°F | 0" | 0" |
| 2023 | 68°F | 40°F | 0" | 0" |
| 2022 | 72°F | 33°F | 0" | 0" |
| 2021 | 87°F | 63°F | 0" | 0" |
| 2020 | 84°F | 50°F | 0" | 0" |
| 2019 | 78°F | 40°F | 0" | 0" |
| 2018 | 87°F | 69°F | 0" | 0" |
| 2017 | 81°F | 65°F | -- | 0" |
| 2016 | 72°F | 48°F | 0" | 0" |
| 2015 | 83°F | 59°F | 0" | 0" |
| 2014 | 72°F | 57°F | 1.04" | 0" |
| 2013 | 76°F | 50°F | 0" | 0" |
| 2012 | 62°F | 38°F | 0" | 0" |
| 2011 | 83°F | 52°F | 0" | -- |
| 2010 | 83°F | 48°F | 0" | 0" |
| 2009 | 58°F | 51°F | 5.84" | 0" |
| 2008 | 70°F | 46°F | 0" | 0" |
| 2007 | 90°F | 55°F | 0.97" | 0" |
| 2006 | 76°F | 42°F | 0" | 0" |
| 2005 | 61°F | 41°F | 0" | 0" |
| 2004 | 68°F | 60°F | 1.07" | 0" |
| 2003 | 81°F | 64°F | 0.05" | 0" |
| 2002 | 66°F | 55°F | 0" | 0" |
| 2001 | 70°F | 46°F | 0" | 0" |
| 2000 | 51°F | 29°F | 0" | 0" |
| 1999 | 74°F | 60°F | 0.25" | 0" |
| 1998 | 56°F | 42°F | 0" | 0" |
| 1997 | 81°F | 69°F | 0.3" | 0" |
| 1996 | 56°F | 37°F | 0" | 0" |
| 1995 | 78°F | 45°F | 0" | 0" |
| 1994 | 66°F | 46°F | 0.2" | 0" |
| 1993 | 75°F | 44°F | 0.51" | 0" |
| 1992 | 69°F | 47°F | 0" | 0" |
| 1991 | 79°F | 54°F | 0" | 0" |
| 1990 | 55°F | 41°F | 4.37" | 0" |
| 1989 | 74°F | 36°F | 0" | 0" |
| 1988 | 65°F | 40°F | 0.03" | 0" |
| 1987 | 75°F | 40°F | 0" | 0" |
| 1985 | 80°F | 53°F | 0" | 0" |
| 1982 | 77°F | 62°F | 3.05" | 0" |
| 1980 | 90°F | 55°F | 0" | -- |
| 1979 | 90°F | 49°F | 0" | 0" |
| 1978 | 65°F | 39°F | 0" | 0" |
| 1977 | 60°F | 38°F | 0" | 0" |
| 1976 | 59°F | 38°F | 0" | 0" |
| 1975 | 79°F | 52°F | 0" | 0" |
| 1974 | 69°F | 40°F | 0" | 0" |
| 1973 | 85°F | 62°F | 0" | 0" |
| 1972 | 75°F | 45°F | 0" | 0" |
| 1971 | 75°F | 45°F | 0" | 0" |