Weather on March 18 at Gateway Arch
Gateway Arch National Park
Based on 55 years of data from St. Louis, MO
Planning Your Visit
March 18th in Gateway Arch National Park (via St. Louis, MO) typically brings cool spring weather, with average highs around 58°F and lows near 36°F. Over 55 years of records, the warmest March 18th was in 2012 (67°F average), while the coldest was 1993 (29°F) — a 38°F range across recorded history. Precipitation has occurred on 35% of recorded March 18th dates, with snow falling 2% of the time (heaviest snowfall: 1.9"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 18th 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 | 69°F | 34°F | 0" | -- |
| 2025 | 82°F | 44°F | 0" | 0" |
| 2024 | 42°F | 28°F | 0" | 0" |
| 2023 | 35°F | 23°F | 0" | 0" |
| 2022 | 62°F | 46°F | 0.38" | 0" |
| 2021 | 48°F | 40°F | 2.36" | 0" |
| 2020 | 61°F | 41°F | 0.69" | 0" |
| 2019 | 53°F | 28°F | 0" | 0" |
| 2018 | 43°F | 39°F | -- | 0" |
| 2017 | 69°F | 40°F | 0" | 0" |
| 2016 | 65°F | 43°F | 0" | 0" |
| 2015 | 53°F | 38°F | 0" | 0" |
| 2014 | 47°F | 34°F | 0" | 0" |
| 2013 | 41°F | 34°F | 2.87" | 0" |
| 2012 | 81°F | 54°F | 2.29" | -- |
| 2011 | 81°F | 51°F | 0" | -- |
| 2010 | 60°F | 38°F | 0" | 0" |
| 2009 | 79°F | 44°F | 0" | 0" |
| 2008 | 56°F | 41°F | 4.06" | 0" |
| 2007 | 38°F | 24°F | 0" | 0" |
| 2006 | 45°F | 31°F | 0" | 0" |
| 2005 | 61°F | 30°F | 0" | 0" |
| 2004 | 54°F | 32°F | 0.13" | 0" |
| 2003 | 72°F | 49°F | 0" | 0" |
| 2002 | 45°F | 39°F | 0" | 0" |
| 2001 | 44°F | 24°F | 0" | 0" |
| 2000 | 49°F | 32°F | 0" | 0" |
| 1999 | 73°F | 40°F | 0" | 0" |
| 1998 | 58°F | 45°F | 2.08" | 0" |
| 1997 | 62°F | 50°F | 0.13" | 0" |
| 1996 | 56°F | 34°F | 0" | 0" |
| 1995 | 76°F | 53°F | 0" | 0" |
| 1994 | 67°F | 42°F | 0.25" | 0" |
| 1993 | 37°F | 22°F | 0" | 0" |
| 1992 | 67°F | 40°F | 1.4" | 0" |
| 1991 | 55°F | 36°F | 0.03" | 0" |
| 1990 | 53°F | 22°F | 0" | 0" |
| 1989 | 75°F | 23°F | 0.25" | 0" |
| 1988 | 46°F | 21°F | 0.48" | 1.9" |
| 1987 | 70°F | 37°F | 1.73" | 0" |
| 1986 | 63°F | 40°F | 0.58" | 0" |
| 1985 | 57°F | 43°F | 0" | 0" |
| 1984 | 43°F | 34°F | 0.25" | 0" |
| 1983 | 61°F | 40°F | 2.54" | 0" |
| 1982 | 62°F | 42°F | 0" | 0" |
| 1980 | 61°F | 31°F | 0" | 0" |
| 1979 | 66°F | 43°F | 0" | 0" |
| 1978 | 42°F | 21°F | 0" | -- |
| 1977 | 59°F | 43°F | 0.33" | 0" |
| 1976 | 58°F | 29°F | 0" | 0" |
| 1975 | 50°F | 35°F | 0" | 0" |
| 1974 | 47°F | 27°F | 0" | 0" |
| 1973 | 57°F | 28°F | 0" | -- |
| 1972 | 61°F | 40°F | 0" | -- |
| 1971 | 48°F | -- | 0" | -- |