Weather on December 20
Saint Louis, MO
55 Years of Data
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.
| 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" | — |
Saint Louis, MO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Saint Louis, MO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Saint Louis, MO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Saint Louis, MO
Saint Louis, MO has no months that meet our "pleasant" threshold — every season has tradeoffs.