Weather on May 9 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
May 9th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant spring weather, with average highs around 76°F and lows near 54°F. Over 53 years of records, the warmest May 9th was in 2018 (77°F average), while the coldest was 2010 (49°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 9th dates historically, with the wettest May 9th recording 2.13" of rain. The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Gateway Arch? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 81°F | 56°F | 0.08" | 0" |
| 2025 | 71°F | 48°F | 0" | 0" |
| 2024 | 78°F | 60°F | -- | 0" |
| 2023 | 76°F | 59°F | 0" | 0" |
| 2022 | 85°F | 62°F | 0" | 0" |
| 2021 | 64°F | 41°F | 0.38" | 0" |
| 2020 | 65°F | 34°F | 0" | 0" |
| 2019 | 69°F | 51°F | 0.38" | 0" |
| 2018 | 87°F | 67°F | 0.15" | 0" |
| 2017 | 84°F | 63°F | 0" | 0" |
| 2016 | 77°F | 66°F | 0" | 0" |
| 2015 | 76°F | 65°F | 0.48" | 0" |
| 2014 | 86°F | 67°F | 0.05" | 0" |
| 2013 | 83°F | 65°F | 0" | 0" |
| 2012 | 74°F | 53°F | 0" | -- |
| 2011 | 83°F | 67°F | 0" | 0" |
| 2010 | 60°F | 38°F | 0" | 0" |
| 2009 | 72°F | 58°F | 1.78" | 0" |
| 2008 | 60°F | 50°F | 0.23" | 0" |
| 2007 | 85°F | 65°F | 0.41" | 0" |
| 2006 | 71°F | 53°F | 0.1" | 0" |
| 2005 | 83°F | 65°F | 0" | 0" |
| 2004 | 86°F | 65°F | 0" | 0" |
| 2003 | 82°F | 55°F | 0.25" | 0" |
| 2002 | 82°F | 62°F | 2.13" | 0" |
| 2001 | 76°F | 50°F | 0" | 0" |
| 2000 | 84°F | 64°F | 0" | 0" |
| 1999 | 76°F | 51°F | 0" | 0" |
| 1998 | 72°F | 58°F | 0" | 0" |
| 1997 | 78°F | 50°F | 0" | 0" |
| 1996 | 88°F | 63°F | 0" | 0" |
| 1995 | 79°F | 57°F | 0.91" | 0" |
| 1994 | 73°F | 49°F | 0" | 0" |
| 1993 | 84°F | 66°F | 0" | 0" |
| 1992 | 83°F | 46°F | 0" | 0" |
| 1991 | 76°F | 60°F | 0" | 0" |
| 1990 | 75°F | 45°F | 0" | 0" |
| 1989 | 66°F | 37°F | 1.4" | 0" |
| 1988 | 77°F | 45°F | 1.6" | 0" |
| 1987 | 82°F | 54°F | 0" | 0" |
| 1986 | 87°F | 61°F | 1.14" | 0" |
| 1985 | 82°F | 54°F | 0" | 0" |
| 1981 | 66°F | 42°F | 0" | 0" |
| 1980 | 71°F | 36°F | -- | -- |
| 1979 | 78°F | 54°F | 0" | 0" |
| 1978 | -- | 52°F | 0" | 0" |
| 1977 | 76°F | 44°F | 0" | 0" |
| 1976 | 66°F | 37°F | 0" | 0" |
| 1975 | 75°F | 58°F | 0.03" | 0" |
| 1974 | 73°F | 48°F | 0.05" | 0" |
| 1973 | 67°F | 53°F | 0.03" | 0" |
| 1972 | 64°F | 46°F | 0.03" | 0" |
| 1971 | 71°F | 45°F | 0" | 0" |