Weather on February 21 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
February 21st in Gateway Arch National Park (via St. Louis, MO) typically brings cool winter weather, with average highs around 52°F and lows near 30°F. Over 53 years of records, the warmest February 21st was in 2017 (70°F average), while the coldest was 2025 (15°F) — a 55°F range across recorded history. Precipitation has occurred on 32% of recorded February 21st dates, with snow falling 2% of the time. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for February 21st 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 | 43°F | 29°F | -- | -- |
| 2025 | 29°F | 1°F | 0" | 0" |
| 2024 | 73°F | 34°F | 0" | 0" |
| 2023 | 57°F | 38°F | 0" | 0" |
| 2022 | 65°F | 38°F | 0" | 0" |
| 2021 | 45°F | 24°F | 0.03" | 0" |
| 2020 | 42°F | 16°F | 0" | 0" |
| 2019 | 45°F | 26°F | 0" | 0" |
| 2018 | 67°F | 28°F | 4.95" | 0" |
| 2017 | 80°F | 59°F | 0.25" | 0" |
| 2016 | 59°F | 40°F | 0" | 0" |
| 2015 | 30°F | 16°F | 0.51" | 0.5" |
| 2014 | 71°F | 34°F | 0.2" | 0" |
| 2013 | 26°F | 21°F | 0" | 0" |
| 2012 | 52°F | 29°F | 0.2" | -- |
| 2011 | 73°F | 42°F | 0.15" | 0" |
| 2010 | 58°F | 37°F | 0.56" | 0" |
| 2009 | 46°F | 22°F | 0.03" | 0" |
| 2008 | 23°F | 15°F | 0" | 0" |
| 2007 | 59°F | 25°F | 0" | 0" |
| 2006 | 35°F | 22°F | 0" | 0" |
| 2005 | 70°F | 40°F | 0" | 0" |
| 2004 | 68°F | 36°F | 0" | 0" |
| 2003 | 47°F | 26°F | 0" | 0" |
| 2002 | 50°F | 37°F | 0.03" | 0" |
| 2001 | 53°F | 25°F | 0" | 0" |
| 2000 | 53°F | 28°F | 0" | 0" |
| 1999 | 38°F | 26°F | 0" | 0" |
| 1998 | 46°F | 38°F | 0" | 0" |
| 1997 | 65°F | 46°F | 2.16" | 0" |
| 1996 | 67°F | 38°F | 0" | 0" |
| 1995 | 58°F | 29°F | 0" | 0" |
| 1994 | 46°F | 34°F | 0" | 0" |
| 1993 | 46°F | 34°F | 0.1" | 0" |
| 1992 | 65°F | 37°F | 0" | 0" |
| 1991 | 71°F | 38°F | 0" | 0" |
| 1990 | 44°F | 29°F | 0" | 0" |
| 1989 | 38°F | 18°F | 0.13" | 0" |
| 1988 | 40°F | 29°F | 0" | 0" |
| 1987 | 51°F | 20°F | 0" | 0" |
| 1985 | 58°F | 44°F | 1.55" | 0" |
| 1983 | 72°F | 40°F | 0" | 0" |
| 1982 | 61°F | 34°F | 0" | 0" |
| 1980 | 48°F | 35°F | 0.03" | 0" |
| 1979 | 43°F | 19°F | 0.81" | 0" |
| 1978 | 31°F | 19°F | 0" | 0" |
| 1977 | 42°F | 18°F | 0" | 0" |
| 1976 | 66°F | 48°F | 0.81" | 0" |
| 1975 | 55°F | 30°F | 0" | 0" |
| 1974 | 52°F | 28°F | 0" | 0" |
| 1973 | 48°F | 18°F | 0" | -- |
| 1972 | 52°F | 31°F | 0" | -- |
| 1971 | 43°F | 35°F | 0" | 0" |