Weather on December 21
Milwaukee, WI
55 Years of Data
Avg High
34°F
Avg Low
19°F
Warmest
2015
42°F avg
Coldest
1989
-10°F avg
About This Date
December 21st in Milwaukee, WI typically brings cold winter weather, with average highs around 34°F and lows near 19°F. Over 55 years of records, the warmest December 21st was in 2015 (42°F average), while the coldest was 1989 (-10°F) — a 52°F range across recorded history. Precipitation has occurred on 24% of recorded December 21st dates, with snow falling 11% of the time (heaviest snowfall: 2.9"). The last decade has been 9.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 9.2°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Milwaukee, WI? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 43° | 10° | 26° | — | — |
| 2024 | 32° | 8° | 20° | — | — |
| 2023 | 45° | 27° | 36° | — | — |
| 2022 | 36° | 7° | 22° | — | — |
| 2021 | 40° | 20° | 30° | — | — |
| 2020 | 43° | 32° | 37° | — | — |
| 2019 | 50° | 30° | 40° | — | — |
| 2018 | 38° | 29° | 34° | — | — |
| 2017 | 40° | 28° | 34° | — | — |
| 2016 | 35° | 24° | 30° | — | — |
| 2015warmest | 46° | 37° | 42° | 0.84" | — |
| 2014 | 37° | 32° | 35° | — | — |
| 2013 | 34° | 27° | 31° | — | — |
| 2012 | 34° | 19° | 26° | — | 0.2" |
| 2011 | 39° | 34° | 36° | 0.08" | — |
| 2010 | 32° | 9° | 20° | 0.41" | 1.6" |
| 2009 | 31° | 24° | 27° | — | — |
| 2008 | 26° | -6° | 10° | 0.38" | 2.9" |
| 2007 | 38° | 27° | 32° | 0.05" | — |
| 2006 | 43° | 29° | 36° | 0.38" | — |
| 2005 | 26° | 7° | 16° | — | — |
| 2004 | 29° | 9° | 19° | 0.1" | 0.4" |
| 2003 | 36° | 15° | 25° | — | — |
| 2002 | 34° | 25° | 29° | 0.05" | 0.2" |
| 2001 | 47° | 21° | 34° | — | — |
| 2000 | 17° | -7° | 5° | 0.13" | 1.8" |
| 1999 | 32° | -1° | 16° | — | — |
| 1998 | 32° | 6° | 19° | — | — |
| 1997 | 37° | 22° | 29° | — | — |
| 1996 | 34° | 17° | 25° | — | — |
| 1995 | 29° | 18° | 23° | — | — |
| 1994 | 50° | 29° | 39° | — | — |
| 1993 | 32° | 24° | 28° | — | — |
| 1992 | 38° | 19° | 28° | — | — |
| 1991 | 37° | 24° | 31° | — | — |
| 1990 | 44° | 24° | 34° | 0.1" | — |
| 1989coldest | -5° | -15° | -10° | — | — |
| 1988 | 36° | 25° | 30° | — | — |
| 1987 | 37° | 25° | 31° | — | — |
| 1986 | 37° | 23° | 30° | — | — |
| 1985 | 15° | -3° | 6° | — | — |
| 1984 | 47° | 32° | 39° | 0.66" | — |
| 1983 | 26° | 19° | 23° | — | — |
| 1982 | 31° | 26° | 28° | — | — |
| 1981 | 34° | 23° | 28° | 0.25" | — |
| 1980 | 23° | 8° | 16° | — | — |
| 1979 | 43° | 34° | 38° | — | — |
| 1978 | 29° | 18° | 23° | — | — |
| 1977 | 34° | 22° | 28° | 0.18" | — |
| 1976 | 14° | -1° | 7° | — | — |
| 1975 | 34° | 20° | 27° | — | — |
| 1974 | 31° | 18° | 24° | — | — |
| 1973 | 26° | 6° | 16° | — | — |
| 1972 | 35° | 30° | 33° | — | — |
| 1971 | 29° | 21° | 25° | — | — |
55 years of data from W ALLIS