Weather on December 21
Madison, WI
55 Years of Data
Avg High
31°F
Avg Low
12°F
Warmest
2015
41°F avg
Coldest
1989
-5°F avg
About This Date
December 21st in Madison, WI typically brings very cold winter weather, with average highs around 31°F and lows near 12°F. Over 55 years of records, the warmest December 21st was in 2015 (41°F average), while the coldest was 1989 (-5°F) — a 46°F range across recorded history. Precipitation has occurred on 31% of recorded December 21st dates, with snow falling 9% of the time (heaviest snowfall: 5"). The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Madison, WI? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 42° | 5° | 24° | — | — |
| 2024 | 30° | 1° | 16° | — | — |
| 2023 | 42° | 21° | 32° | — | — |
| 2022 | 26° | 0° | 13° | — | — |
| 2021 | 41° | 14° | 28° | — | — |
| 2020 | 39° | 24° | 32° | — | — |
| 2019 | 43° | 24° | 33° | — | — |
| 2018 | 39° | 29° | 34° | — | — |
| 2017 | 26° | 22° | 24° | — | — |
| 2016 | 32° | 21° | 27° | — | — |
| 2015warmest | 47° | 36° | 41° | 0.13" | — |
| 2014 | 33° | 23° | 28° | — | — |
| 2013 | 24° | 20° | 22° | — | — |
| 2012 | 32° | 14° | 23° | 0.76" | 3" |
| 2011 | 37° | 21° | 29° | 0.13" | — |
| 2010 | 28° | 13° | 20° | 0.76" | 2" |
| 2009 | 26° | 23° | 25° | — | — |
| 2008 | 26° | -10° | 8° | 0.33" | 2.5" |
| 2007 | 37° | 23° | 30° | — | — |
| 2006 | 40° | 28° | 34° | 0.76" | — |
| 2005 | 22° | 1° | 11° | — | — |
| 2004 | 28° | 13° | 20° | — | — |
| 2003 | 42° | 24° | 33° | — | — |
| 2002 | 31° | 27° | 29° | — | — |
| 2001 | 40° | 18° | 29° | — | — |
| 2000 | 13° | 0° | 6° | 0.89" | 5" |
| 1999 | 14° | -7° | 4° | — | — |
| 1998 | 29° | 14° | 21° | 0.08" | 1" |
| 1997 | 36° | 6° | 21° | — | — |
| 1996 | 22° | -4° | 9° | — | — |
| 1995 | 28° | 10° | 19° | — | — |
| 1994 | 42° | 20° | 31° | — | — |
| 1993 | 32° | 21° | 27° | 0.05" | — |
| 1992 | 23° | 3° | 13° | — | — |
| 1991 | 33° | 20° | 26° | 0.81" | — |
| 1990 | 34° | 16° | 25° | — | — |
| 1989coldest | 8° | -19° | -5° | — | — |
| 1988 | 52° | 21° | 36° | — | — |
| 1987 | 35° | 19° | 27° | 0.25" | — |
| 1986 | 36° | 4° | 20° | — | — |
| 1985 | 18° | -15° | 2° | — | — |
| 1984 | 31° | 11° | 21° | 0.28" | — |
| 1983 | 19° | -2° | 9° | 0.23" | — |
| 1982 | 32° | 8° | 20° | — | — |
| 1981 | 32° | 5° | 19° | 0.46" | — |
| 1980 | 13° | -8° | 3° | — | — |
| 1979 | 43° | 14° | 28° | — | — |
| 1978 | 33° | 10° | 22° | 0.03" | — |
| 1977 | 33° | 21° | 27° | 0.71" | — |
| 1976 | 16° | -6° | 5° | — | — |
| 1975 | 34° | 7° | 20° | — | — |
| 1974 | 30° | 16° | 23° | 0.1" | — |
| 1973 | 19° | -7° | 6° | — | — |
| 1972 | 35° | 29° | 32° | — | — |
| 1971 | 30° | 21° | 26° | — | — |
55 years of data from UW ARBORETUM - MADISON