Weather on March 20 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
March 20th in Gateway Arch National Park (via St. Louis, MO) typically brings cool spring weather, with average highs around 58°F and lows near 37°F. Over 53 years of records, the warmest March 20th was in 2012 (72°F average), while the coldest was 1974 (35°F) — a 37°F range across recorded history. Precipitation has occurred on 34% of recorded March 20th dates, with snow falling 2% of the time. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for March 20th in Gateway Arch? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 89°F | 43°F | 0" | -- |
| 2025 | 51°F | 31°F | 0.03" | -- |
| 2024 | 60°F | 35°F | 0" | 0" |
| 2023 | 58°F | 19°F | 0" | 0" |
| 2022 | 73°F | 31°F | 0" | 0" |
| 2021 | 60°F | 28°F | 0" | 0" |
| 2020 | 68°F | 37°F | 0" | 0" |
| 2019 | 55°F | 43°F | 0.05" | 0" |
| 2018 | 48°F | 34°F | 0.2" | 0" |
| 2017 | 58°F | 47°F | 0" | 0" |
| 2016 | 50°F | 33°F | 0.36" | -- |
| 2015 | 57°F | 42°F | 0" | 0" |
| 2014 | 60°F | 32°F | 0" | 0" |
| 2013 | 48°F | 28°F | 0" | 0" |
| 2012 | 81°F | 63°F | 0" | -- |
| 2011 | 59°F | 43°F | 0.86" | -- |
| 2010 | 69°F | 41°F | 0" | 0" |
| 2009 | 58°F | 30°F | 0" | 0" |
| 2008 | 47°F | 32°F | 0.03" | 0" |
| 2007 | 70°F | 45°F | 0" | 0" |
| 2006 | 45°F | 37°F | 0" | 0" |
| 2005 | 48°F | 27°F | 0" | 0" |
| 2004 | 64°F | 40°F | 0" | 0" |
| 2003 | 67°F | 49°F | 0.56" | 0" |
| 2002 | 49°F | 42°F | 0.58" | 0" |
| 2001 | 50°F | 32°F | 0" | 0" |
| 2000 | 47°F | 35°F | 1.45" | 0" |
| 1999 | 51°F | 39°F | 0" | 0" |
| 1998 | 43°F | 34°F | 4.5" | 0" |
| 1997 | 54°F | 36°F | 0" | 0" |
| 1996 | 42°F | 29°F | 0.18" | 0.5" |
| 1995 | 73°F | 38°F | 0" | 0" |
| 1994 | 73°F | 49°F | 0" | 0" |
| 1993 | 44°F | 36°F | 0.36" | 0" |
| 1992 | 55°F | 31°F | 0" | 0" |
| 1991 | 68°F | 53°F | 0" | 0" |
| 1990 | 53°F | 27°F | 0" | 0" |
| 1989 | 44°F | 28°F | 7.19" | 0" |
| 1988 | 63°F | 32°F | 0" | 0" |
| 1987 | 65°F | 36°F | 0" | 0" |
| 1985 | 66°F | 43°F | 0.03" | 0" |
| 1984 | 40°F | 32°F | 1.07" | 0" |
| 1983 | 50°F | 40°F | 1.27" | 0" |
| 1980 | 60°F | 35°F | 0" | 0" |
| 1979 | 70°F | 47°F | 0.38" | 0" |
| 1978 | 58°F | 35°F | 0" | -- |
| 1977 | 51°F | 37°F | 0" | 0" |
| 1976 | 72°F | 61°F | 0" | 0" |
| 1975 | 61°F | 38°F | 0" | 0" |
| 1974 | 43°F | 28°F | 0" | 0" |
| 1973 | 55°F | 34°F | 2.13" | 0" |
| 1972 | 78°F | 47°F | 0" | -- |
| 1971 | 41°F | -- | 0" | -- |