Weather on May 15 at Gateway Arch
Gateway Arch National Park
Based on 54 years of data from St. Louis, MO
Planning Your Visit
May 15th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant spring weather, with average highs around 75°F and lows near 55°F. Over 54 years of records, the warmest May 15th was in 2013 (82°F average), while the coldest was 2016 (51°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 43% of May 15th dates historically, with the wettest May 15th recording 3" of rain. The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
Planning for May 15th 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 | 84°F | 58°F | 0" | 0" |
| 2025 | 86°F | 69°F | 0" | 0" |
| 2024 | 78°F | 61°F | 0" | 0" |
| 2023 | 76°F | 63°F | 0.05" | 0" |
| 2022 | 86°F | 61°F | 0.18" | 0" |
| 2021 | 65°F | 49°F | 0.03" | 0" |
| 2020 | 76°F | 60°F | 0.58" | 0" |
| 2019 | 80°F | 57°F | 0.36" | 0" |
| 2018 | 91°F | 72°F | 1.02" | 0" |
| 2017 | 84°F | 62°F | 0" | 0" |
| 2016 | 60°F | 43°F | 0" | 0" |
| 2015 | 84°F | 61°F | 0.28" | 0" |
| 2014 | 58°F | 46°F | 1.14" | 0" |
| 2013 | 93°F | 71°F | 0" | 0" |
| 2012 | 78°F | 50°F | 0" | -- |
| 2011 | 55°F | 49°F | 0.3" | 0" |
| 2010 | 64°F | 55°F | 1.57" | 0" |
| 2009 | 76°F | 61°F | 0" | 0" |
| 2008 | 69°F | 52°F | 0" | 0" |
| 2007 | 83°F | 65°F | 0" | 0" |
| 2006 | 56°F | 49°F | 0.15" | 0" |
| 2005 | 73°F | 46°F | 0" | 0" |
| 2004 | 61°F | 51°F | 0.36" | 0" |
| 2003 | 75°F | 58°F | 0.36" | 0" |
| 2002 | 70°F | 48°F | 0" | 0" |
| 2001 | 87°F | 63°F | 0" | 0" |
| 2000 | 70°F | 51°F | 0" | 0" |
| 1999 | 62°F | 54°F | 0" | 0" |
| 1998 | 88°F | 70°F | 0" | 0" |
| 1997 | 70°F | 42°F | 0" | 0" |
| 1996 | 85°F | 50°F | 0.71" | 0" |
| 1995 | 76°F | 55°F | 0" | 0" |
| 1994 | 78°F | 62°F | 0.33" | 0" |
| 1993 | 82°F | 55°F | 0" | 0" |
| 1992 | 80°F | 53°F | 0" | 0" |
| 1991 | 84°F | 64°F | 0.25" | 0" |
| 1990 | 73°F | 58°F | 1.65" | 0" |
| 1989 | 77°F | 47°F | 0" | 0" |
| 1988 | 88°F | 57°F | 0" | 0" |
| 1987 | 84°F | 48°F | 0.1" | 0" |
| 1986 | 78°F | 61°F | 1.32" | 0" |
| 1985 | 80°F | 55°F | 0.25" | 0" |
| 1984 | 75°F | 43°F | 0" | 0" |
| 1981 | 61°F | 50°F | 0" | 0" |
| 1980 | 74°F | 48°F | -- | -- |
| 1979 | 75°F | 45°F | 0" | 0" |
| 1978 | 64°F | -- | 0.13" | 0" |
| 1977 | 81°F | 55°F | 0" | 0" |
| 1976 | 65°F | 60°F | 0.66" | 0" |
| 1975 | 77°F | 58°F | 0" | 0" |
| 1974 | 68°F | 47°F | 3" | 0" |
| 1973 | 63°F | 43°F | 0" | 0" |
| 1972 | 73°F | 56°F | 0" | 0" |
| 1971 | 70°F | 47°F | 0" | 0" |