Weather on January 21 at Gateway Arch
Gateway Arch National Park
Based on 53 years of data from St. Louis, MO
Planning Your Visit
January 21st in Gateway Arch National Park (via St. Louis, MO) typically brings chilly winter weather, with average highs around 41°F and lows near 21°F. Over 53 years of records, the warmest January 21st was in 2018 (56°F average), while the coldest was 2025 (8°F) — a 48°F range across recorded history. Precipitation has occurred on 19% of recorded January 21st dates, with snow falling 6% of the time (heaviest snowfall: 1.4"). 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 January 21st in Gateway Arch? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 51°F | 33°F | 0" | 0" |
| 2025 | 14°F | 2°F | 0" | -- |
| 2024 | 32°F | 4°F | 0" | 0" |
| 2023 | 43°F | 23°F | 0" | 0" |
| 2022 | 27°F | 5°F | 0" | 0" |
| 2021 | 54°F | 30°F | 0" | 0" |
| 2020 | 32°F | 18°F | 0" | 0" |
| 2019 | 24°F | 8°F | 0" | 0" |
| 2018 | 67°F | 46°F | 0" | 0" |
| 2017 | 59°F | 48°F | 0" | 0" |
| 2016 | 28°F | 17°F | 0" | 0" |
| 2015 | 51°F | 35°F | 0" | 0" |
| 2014 | 50°F | 11°F | 0.2" | 1" |
| 2013 | 29°F | 19°F | 0" | 0" |
| 2012 | 36°F | 16°F | 0.08" | -- |
| 2011 | 25°F | 5°F | 0.13" | 1.4" |
| 2010 | 45°F | 37°F | 0.18" | 0" |
| 2009 | 32°F | 14°F | 0" | 0" |
| 2008 | 21°F | 7°F | 0" | 0" |
| 2007 | 36°F | 24°F | 0.61" | 1.1" |
| 2006 | 64°F | 35°F | 0.46" | 0" |
| 2005 | 58°F | 29°F | 0" | 0" |
| 2004 | 46°F | 19°F | 0" | -- |
| 2003 | 42°F | 20°F | 0" | 0" |
| 2002 | 40°F | 20°F | 0" | 0" |
| 2001 | 27°F | 14°F | 0" | 0" |
| 2000 | 27°F | 12°F | 0" | 0" |
| 1999 | 45°F | 29°F | 0.28" | 0" |
| 1998 | 37°F | 24°F | 0" | 0" |
| 1997 | 60°F | 29°F | 0" | 0" |
| 1996 | 35°F | 7°F | 0" | 0" |
| 1995 | 26°F | 19°F | 0" | 0" |
| 1994 | 31°F | -4°F | 0" | 0" |
| 1993 | 44°F | 32°F | 1.14" | 0" |
| 1992 | 58°F | 29°F | 0" | 0" |
| 1991 | 24°F | 9°F | 0" | 0" |
| 1990 | 46°F | 32°F | 0" | 0" |
| 1989 | 46°F | 20°F | 0" | 0" |
| 1988 | 37°F | 22°F | 0" | 0" |
| 1986 | 78°F | 32°F | 0" | 0" |
| 1983 | 38°F | 27°F | 0.03" | 0" |
| 1982 | 35°F | 31°F | 0" | 0" |
| 1981 | 38°F | 28°F | -- | 0" |
| 1980 | 37°F | 22°F | 0" | 0" |
| 1979 | 36°F | 24°F | 0" | 0" |
| 1978 | 29°F | 6°F | 0" | 0" |
| 1977 | 32°F | 10°F | -- | 0" |
| 1976 | 39°F | 18°F | 0" | -- |
| 1975 | 34°F | 9°F | 0" | 0" |
| 1974 | 59°F | 40°F | -- | -- |
| 1973 | 53°F | 25°F | 0.53" | -- |
| 1972 | 56°F | 31°F | 0" | -- |
| 1971 | 37°F | 6°F | 0" | -- |