Weather on December 20
Saint Louis, MO
55 Years of Data
Avg High
44°F
Avg Low
25°F
Warmest
1978
52°F avg
Coldest
1989
7°F avg
About This Date
December 20th in Saint Louis, MO typically brings chilly winter weather, with average highs around 44°F and lows near 25°F. Over 54 years of records, the warmest December 20th was in 1978 (52°F average), while the coldest was 1989 (7°F) — a 45°F range across recorded history. Precipitation has occurred on 24% of recorded December 20th dates, with snow falling 4% of the time (heaviest snowfall: 3"). The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Saint Louis, MO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 30° | 44° | — | — |
| 2024 | 42° | 30° | 36° | — | — |
| 2023 | 57° | 31° | 44° | — | — |
| 2022 | 45° | 26° | 36° | — | — |
| 2021 | 47° | 23° | 35° | — | — |
| 2020 | 50° | 24° | 37° | — | — |
| 2019 | 44° | 19° | 32° | — | — |
| 2018 | 48° | 38° | 43° | 0.25" | — |
| 2017 | 53° | 37° | 45° | — | — |
| 2016 | 44° | 11° | 28° | — | — |
| 2015 | 52° | 34° | 43° | — | — |
| 2014 | 37° | 33° | 35° | — | — |
| 2013 | 60° | 35° | 48° | — | — |
| 2012 | 55° | 37° | 46° | 1.07" | — |
| 2011 | 54° | 44° | 49° | 1.8" | — |
| 2010 | 40° | 26° | 33° | — | — |
| 2009 | 35° | 25° | 30° | — | — |
| 2008 | 50° | 28° | 39° | — | — |
| 2007 | 46° | 22° | 34° | 0.08" | — |
| 2006 | 42° | 30° | 36° | 0.28" | — |
| 2005 | 31° | 12° | 21° | — | — |
| 2004 | 20° | 14° | 17° | — | — |
| 2003 | 37° | 19° | 28° | — | — |
| 2002 | 46° | 34° | 40° | 0.03" | — |
| 2001 | 43° | 25° | 34° | — | — |
| 2000 | 19° | -1° | 9° | — | — |
| 1999 | 46° | 25° | 35° | — | — |
| 1998 | 38° | 33° | 35° | — | — |
| 1997 | 61° | 34° | 47° | — | — |
| 1996 | 15° | 8° | 12° | — | — |
| 1995 | 30° | 16° | 23° | — | — |
| 1994 | 47° | 38° | 42° | 0.51" | — |
| 1993 | 46° | 30° | 38° | — | — |
| 1992 | 42° | 25° | 33° | 0.25" | — |
| 1991 | 42° | 33° | 38° | 1.4" | — |
| 1990 | 57° | 23° | 40° | — | — |
| 1989coldest | 21° | -8° | 7° | — | — |
| 1988 | 70° | 25° | 47° | — | — |
| 1987 | 47° | 19° | 33° | 0.99" | — |
| 1986 | 53° | 24° | 39° | — | — |
| 1985 | 21° | 2° | 11° | 0.53" | 1.7" |
| 1984 | 38° | 32° | 35° | 1.32" | — |
| 1982 | 55° | 28° | 42° | — | — |
| 1981 | 27° | 1° | 14° | — | — |
| 1980 | 17° | 7° | 12° | — | — |
| 1979 | 58° | 21° | 39° | — | — |
| 1978warmest | 62° | 41° | 52° | — | — |
| 1977 | 53° | 26° | 40° | — | — |
| 1976 | 58° | 20° | 39° | — | — |
| 1975 | 51° | 32° | 42° | — | — |
| 1974 | 45° | 30° | 37° | — | — |
| 1973 | 32° | 11° | 21° | — | 3" |
| 1972 | 43° | 35° | 39° | — | — |
| 1971 | 45° | 38° | 41° | 0.51" | — |
54 years of data from ST LOUIS ST LOUIS UNIV