Weather on September 27 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
September 27th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 79°F and lows near 54°F — a 25°F daily swing. Over 53 years of records, the warmest September 27th was in 1986 (80°F average), while the coldest was 1975 (52°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 26% of September 27th dates historically, with the wettest September 27th recording 4.24" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Gateway Arch? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 51°F | 0" | 0" |
| 2024 | 70°F | 63°F | 4.24" | -- |
| 2023 | 82°F | 65°F | 2.29" | 0" |
| 2022 | 73°F | 45°F | 0" | 0" |
| 2021 | 90°F | 58°F | 0" | 0" |
| 2020 | 84°F | 54°F | 0.79" | 0" |
| 2019 | 91°F | 58°F | 0" | 0" |
| 2018 | 73°F | 50°F | 0" | 0" |
| 2017 | 91°F | -- | -- | 0" |
| 2016 | 81°F | 49°F | 0" | 0" |
| 2015 | 74°F | 67°F | 0" | 0" |
| 2014 | 84°F | 63°F | 0" | 0" |
| 2013 | 85°F | 64°F | 0" | 0" |
| 2012 | 79°F | 64°F | 0.03" | 0" |
| 2011 | 71°F | 47°F | 0" | -- |
| 2010 | 80°F | 48°F | 0.05" | 0" |
| 2009 | 69°F | 53°F | 0.48" | 0" |
| 2008 | 79°F | 50°F | 0" | 0" |
| 2007 | 70°F | 62°F | 0" | 0" |
| 2006 | 80°F | 54°F | 0" | 0" |
| 2005 | 77°F | 54°F | 0" | 0" |
| 2004 | 78°F | 47°F | 0" | 0" |
| 2003 | 84°F | 53°F | 3.89" | 0" |
| 2002 | 74°F | 55°F | 0" | 0" |
| 2001 | 70°F | 41°F | 0" | 0" |
| 2000 | 67°F | 43°F | 0" | 0" |
| 1999 | 88°F | 60°F | 0" | 0" |
| 1998 | 90°F | 69°F | 0" | 0" |
| 1997 | 80°F | 51°F | 0" | 0" |
| 1996 | 69°F | 53°F | 2.34" | 0" |
| 1995 | 78°F | 46°F | 0" | 0" |
| 1994 | 66°F | 53°F | 0" | 0" |
| 1993 | 67°F | 43°F | 0" | 0" |
| 1992 | 76°F | 49°F | 0.84" | 0" |
| 1991 | 72°F | 48°F | 0" | 0" |
| 1990 | 89°F | 67°F | 0" | 0" |
| 1989 | 70°F | 36°F | 0" | 0" |
| 1988 | 84°F | 54°F | 0" | 0" |
| 1987 | 85°F | 54°F | 0" | 0" |
| 1986 | 88°F | 72°F | 3.48" | 0" |
| 1985 | 70°F | 41°F | 0" | 0" |
| 1982 | 84°F | 47°F | 0" | 0" |
| 1981 | 78°F | 60°F | 1.78" | 0" |
| 1980 | 75°F | 47°F | 0" | 0" |
| 1979 | 86°F | 49°F | 0" | 0" |
| 1978 | 79°F | 50°F | 0" | 0" |
| 1977 | 84°F | 61°F | 1.22" | 0" |
| 1976 | 78°F | 56°F | 1.19" | 0" |
| 1975 | 69°F | 36°F | 0" | 0" |
| 1974 | 78°F | 46°F | 0" | 0" |
| 1973 | 85°F | 68°F | 0" | 0" |
| 1972 | 82°F | 63°F | 0.66" | 0" |
| 1971 | 91°F | -- | 0" | 0" |