Weather on March 31 at Gateway Arch
Gateway Arch National Park
Based on 55 years of data from St. Louis, MO
Planning Your Visit
March 31st in Gateway Arch National Park (via St. Louis, MO) typically brings mild spring weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest March 31st was in 2026 (74°F average), while the coldest was 1975 (35°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 36% of March 31st dates historically, with the wettest March 31st recording 2.95" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for March 31st 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 | 65°F | 0" | -- |
| 2025 | 55°F | 40°F | 0" | 0" |
| 2024 | 82°F | 55°F | 0" | 0" |
| 2023 | 75°F | 54°F | 2.74" | -- |
| 2022 | 42°F | 38°F | 0" | 0" |
| 2021 | 55°F | 38°F | 0" | 0" |
| 2020 | 62°F | 40°F | 0" | 0" |
| 2019 | 45°F | 31°F | 0" | 0" |
| 2018 | 58°F | -- | 0" | 0" |
| 2017 | 70°F | 45°F | 0.89" | 0" |
| 2016 | 68°F | 57°F | 1.78" | 0" |
| 2015 | 71°F | 51°F | 0" | 0" |
| 2014 | 64°F | 46°F | 0" | 0" |
| 2013 | 64°F | 47°F | 0.25" | 0" |
| 2012 | 82°F | 49°F | 0" | -- |
| 2011 | 51°F | 33°F | 0" | 0" |
| 2010 | 72°F | 41°F | 0" | 0" |
| 2009 | 66°F | 36°F | 0.2" | 0" |
| 2008 | 62°F | 47°F | 0.03" | 0" |
| 2007 | 67°F | 59°F | 0.71" | 0" |
| 2006 | 77°F | 45°F | 0.08" | 0" |
| 2005 | 79°F | 46°F | 0.05" | 0" |
| 2004 | 53°F | 36°F | 0.05" | 0" |
| 2003 | 51°F | 33°F | 0" | 0" |
| 2002 | 62°F | 42°F | 0" | 0" |
| 2001 | 54°F | 32°F | 0" | 0" |
| 2000 | 60°F | 33°F | 0" | 0" |
| 1999 | 71°F | 42°F | 0" | 0" |
| 1998 | 78°F | 57°F | 1.4" | 0" |
| 1997 | 57°F | 37°F | 0" | 0" |
| 1996 | 58°F | 41°F | 2.95" | 0" |
| 1995 | 49°F | 29°F | 0" | 0" |
| 1994 | 57°F | 24°F | 0" | 0" |
| 1993 | 72°F | 51°F | 1.22" | 0" |
| 1992 | 63°F | 31°F | 0" | 0" |
| 1991 | 66°F | 33°F | 0" | 0" |
| 1990 | 60°F | 46°F | 0" | 0" |
| 1989 | 50°F | 28°F | 0.86" | 0" |
| 1988 | 55°F | 45°F | 0" | 0" |
| 1987 | 48°F | 29°F | 0" | 0" |
| 1986 | 84°F | 56°F | 0" | 0" |
| 1985 | 50°F | 38°F | 1.83" | 0" |
| 1984 | 55°F | 28°F | 0" | 0" |
| 1983 | 47°F | 40°F | 0.05" | 0" |
| 1982 | 68°F | 46°F | 0.76" | 0" |
| 1980 | 51°F | 39°F | 0.51" | 0" |
| 1979 | 70°F | 43°F | 0.53" | 0" |
| 1978 | 66°F | 43°F | 0" | -- |
| 1977 | 71°F | 38°F | 0" | 0" |
| 1976 | 57°F | 31°F | 0" | 0" |
| 1975 | 45°F | 26°F | 0" | 0" |
| 1974 | 64°F | 40°F | 0" | 0" |
| 1973 | 66°F | 41°F | 1.57" | 0" |
| 1972 | 49°F | 30°F | 0" | -- |
| 1971 | 71°F | -- | 0" | -- |