Weather on March 12 at Gateway Arch
Gateway Arch National Park
Based on 55 years of data from St. Louis, MO
Planning Your Visit
March 12th in Gateway Arch National Park (via St. Louis, MO) typically brings cool spring weather, with average highs around 56°F and lows near 34°F. Over 55 years of records, the warmest March 12th was in 1990 (71°F average), while the coldest was 1998 (17°F) — a 54°F range across recorded history. Precipitation has occurred on 40% of recorded March 12th dates, with snow falling 4% of the time (heaviest snowfall: 2.5"). The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
Planning for March 12th 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 | 55°F | 32°F | 0" | 0" |
| 2025 | 78°F | 32°F | 0" | 0" |
| 2024 | 75°F | 42°F | 0" | 0" |
| 2023 | 45°F | 32°F | 0.05" | -- |
| 2022 | 33°F | 14°F | 0" | 0" |
| 2021 | 58°F | 45°F | 0.2" | 0" |
| 2020 | 58°F | 40°F | 0.74" | 0" |
| 2019 | 51°F | 30°F | 0.23" | 0" |
| 2018 | 47°F | -- | 0" | 0" |
| 2017 | 44°F | 27°F | 0" | 0" |
| 2016 | 60°F | 48°F | 0" | 0" |
| 2015 | 73°F | 44°F | 0" | 0" |
| 2014 | 79°F | 35°F | 1.09" | 0" |
| 2013 | 37°F | 29°F | 0" | 0" |
| 2012 | 65°F | 41°F | 0.38" | -- |
| 2011 | 60°F | 33°F | 0" | -- |
| 2010 | 70°F | 44°F | 0" | 0" |
| 2009 | 36°F | 24°F | 0" | 0" |
| 2008 | 60°F | 22°F | 0" | 0" |
| 2007 | 63°F | 35°F | 0" | 0" |
| 2006 | 80°F | 53°F | 2.01" | 0" |
| 2005 | 50°F | 34°F | 0" | 0" |
| 2004 | 55°F | 27°F | 0" | 0" |
| 2003 | 59°F | 39°F | 2.24" | 0" |
| 2002 | 47°F | 37°F | 0.15" | 0" |
| 2001 | 54°F | 38°F | 0.08" | 0" |
| 2000 | 38°F | 18°F | 0.51" | 2" |
| 1999 | 43°F | 25°F | 0" | 0" |
| 1998 | 24°F | 10°F | 0" | 0" |
| 1997 | 63°F | 37°F | 0" | 0" |
| 1996 | 61°F | 30°F | 0" | 0" |
| 1995 | 73°F | 45°F | 0" | 0" |
| 1994 | 65°F | 30°F | 0" | 0" |
| 1993 | 39°F | 20°F | 0" | 0" |
| 1992 | 38°F | 32°F | 0" | 0" |
| 1991 | 65°F | 32°F | 1.65" | 0" |
| 1990 | 83°F | 60°F | 0.91" | 0" |
| 1989 | 70°F | 40°F | 0" | 0" |
| 1988 | 71°F | 44°F | 0.81" | 0" |
| 1987 | 53°F | 30°F | 0" | 0" |
| 1986 | 61°F | 42°F | 2.21" | 0" |
| 1985 | 50°F | 33°F | 0.64" | 0" |
| 1984 | 35°F | 21°F | 0.51" | 2.5" |
| 1983 | 40°F | 31°F | 0" | 0" |
| 1982 | 60°F | 21°F | 0" | 0" |
| 1980 | 42°F | 24°F | 0" | 0" |
| 1979 | 60°F | 23°F | 0" | 0" |
| 1978 | 46°F | 34°F | 0.13" | -- |
| 1977 | 67°F | 44°F | 5.84" | 0" |
| 1976 | 68°F | 38°F | 0.69" | 0" |
| 1975 | 37°F | 30°F | 2.9" | 0" |
| 1974 | 60°F | 43°F | 0.1" | 0" |
| 1973 | 57°F | 44°F | 0" | 0" |
| 1972 | 68°F | 40°F | 0" | -- |
| 1971 | 69°F | -- | 0" | -- |