Weather on December 18 at Gateway Arch
Gateway Arch National Park
Based on 52 years of data from St. Louis, MO
Planning Your Visit
December 18th in Gateway Arch National Park (via St. Louis, MO) typically brings chilly winter weather, with average highs around 41°F and lows near 24°F. Over 52 years of records, the warmest December 18th was in 2002 (54°F average), while the coldest was 2000 (9°F) — a 45°F range across recorded history. Precipitation has occurred on 19% of recorded December 18th dates, with snow falling 2% of the time. 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 December 18th in Gateway Arch? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 58°F | 27°F | 0.86" | -- |
| 2024 | 46°F | 29°F | 0.03" | 0" |
| 2023 | 39°F | 26°F | 0" | 0" |
| 2022 | 34°F | 20°F | 0" | 0" |
| 2021 | 39°F | 30°F | 0.64" | 0" |
| 2020 | 42°F | 25°F | 0" | 0" |
| 2019 | 32°F | 15°F | 0" | 0" |
| 2018 | 50°F | 26°F | 0" | 0" |
| 2017 | 55°F | 46°F | 0" | 0" |
| 2016 | 18°F | 5°F | 0" | -- |
| 2015 | 36°F | 28°F | 0" | 0" |
| 2014 | 39°F | 29°F | 0" | 0" |
| 2013 | 43°F | 26°F | 0" | 0" |
| 2012 | 42°F | 34°F | 0" | -- |
| 2011 | 48°F | 24°F | 0" | -- |
| 2010 | 32°F | 17°F | 0" | 0" |
| 2009 | 54°F | 23°F | 0" | 0" |
| 2008 | 30°F | 18°F | 0" | 0" |
| 2007 | 36°F | 12°F | 0" | 0" |
| 2006 | 64°F | 42°F | 0" | 0" |
| 2005 | 42°F | 20°F | 0" | 0" |
| 2004 | 44°F | 25°F | 0" | 0" |
| 2003 | 42°F | 32°F | 0.15" | 0" |
| 2002 | 62°F | 46°F | 0.76" | 0" |
| 2001 | 48°F | 28°F | 0.3" | 0" |
| 2000 | 16°F | 2°F | 0" | 0" |
| 1999 | 55°F | 31°F | 0" | 0" |
| 1998 | 45°F | 28°F | 0" | 0" |
| 1997 | 51°F | 26°F | 0" | 0" |
| 1996 | 27°F | 13°F | 0.08" | 0.4" |
| 1995 | 44°F | 36°F | 1.27" | 0" |
| 1994 | 55°F | 26°F | 0" | 0" |
| 1993 | 50°F | 35°F | 0" | 0" |
| 1992 | 40°F | 30°F | 0" | 0" |
| 1991 | 41°F | 24°F | 0" | 0" |
| 1990 | 46°F | 30°F | 0.51" | 0" |
| 1989 | 23°F | 9°F | 0" | 0" |
| 1988 | 33°F | 22°F | 0" | 0" |
| 1985 | 22°F | 7°F | 0" | 0" |
| 1984 | 45°F | 28°F | 0.3" | 0" |
| 1982 | 45°F | 28°F | 0" | 0" |
| 1981 | 23°F | 2°F | 0" | -- |
| 1980 | 46°F | 32°F | 0" | 0" |
| 1979 | 25°F | 9°F | 0" | 0" |
| 1978 | 47°F | 33°F | 0" | 0" |
| 1977 | 55°F | 35°F | 0" | 0" |
| 1976 | 58°F | 26°F | 0" | 0" |
| 1975 | 22°F | 8°F | 0" | 0" |
| 1974 | 34°F | 15°F | 0" | 0" |
| 1973 | 28°F | 13°F | 0" | 0" |
| 1972 | 39°F | 16°F | 0" | 0" |
| 1971 | 46°F | 17°F | 0" | 0" |