Weather on December 21
Ann Arbor, MI
55 Years of Data
About This Date
December 21st in Ann Arbor, MI typically brings cold winter weather, with average highs around 34°F and lows near 20°F. Over 55 years of records, the warmest December 21st was in 2015 (45°F average), while the coldest was 1989 (2°F) — a 43°F range across recorded history. Precipitation has occurred on 45% of recorded December 21st dates, with snow falling 25% of the time (heaviest snowfall: 3.3"). The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Ann Arbor, MI? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 34° | 12° | 23° | — | — |
| 2024 | 25° | 5° | 15° | — | — |
| 2023 | 42° | 26° | 34° | — | — |
| 2022 | 31° | 17° | 24° | — | — |
| 2021 | 38° | 19° | 29° | — | — |
| 2020 | 37° | 29° | 33° | 0.15" | — |
| 2019 | 46° | 21° | 34° | — | — |
| 2018 | 41° | 32° | 37° | 0.53" | — |
| 2017 | 34° | 26° | 30° | — | — |
| 2016 | 33° | 3° | 18° | — | — |
| 2015warmest | 51° | 39° | 45° | 1.19" | — |
| 2014 | 34° | 19° | 27° | — | — |
| 2013 | 37° | 33° | 35° | 1.7" | — |
| 2012 | 47° | 27° | 37° | 1.88" | 0.5" |
| 2011 | 40° | 29° | 34° | 0.05" | — |
| 2010 | 33° | 21° | 27° | — | — |
| 2009 | 36° | 22° | 29° | 0.05" | 0.4" |
| 2008 | 24° | 14° | 19° | 0.23" | 1.8" |
| 2007 | 38° | 27° | 33° | — | — |
| 2006 | 40° | 36° | 38° | 0.89" | — |
| 2005 | 24° | 20° | 22° | — | — |
| 2004 | 41° | 15° | 28° | — | — |
| 2003 | 43° | 23° | 33° | — | — |
| 2002 | 33° | 28° | 31° | — | — |
| 2001 | 38° | 17° | 27° | — | — |
| 2000 | 24° | -2° | 11° | 0.1" | — |
| 1999 | 22° | 14° | 18° | — | — |
| 1998 | 39° | 24° | 32° | 0.53" | — |
| 1997 | 32° | 27° | 29° | — | — |
| 1996 | 29° | 5° | 17° | — | — |
| 1995 | 23° | 11° | 17° | 0.13" | 1.2" |
| 1994 | 49° | 26° | 37° | — | — |
| 1993 | 33° | 26° | 30° | 0.3" | 1.5" |
| 1992 | 30° | 15° | 23° | — | — |
| 1991 | 41° | 30° | 36° | 0.48" | 1.4" |
| 1990 | 48° | 33° | 41° | 0.94" | — |
| 1989coldest | 8° | -5° | 2° | 0.1" | 0.4" |
| 1988 | 52° | 32° | 42° | — | — |
| 1987 | 42° | 27° | 34° | — | — |
| 1986 | 38° | 21° | 29° | — | — |
| 1985 | 20° | 12° | 16° | 0.13" | 0.8" |
| 1984 | 38° | 21° | 29° | 0.86" | — |
| 1983 | 26° | 10° | 18° | 0.36" | 0.9" |
| 1982 | 31° | 29° | 30° | — | — |
| 1981 | 30° | 7° | 18° | 0.46" | 1.4" |
| 1980 | 21° | 6° | 14° | — | — |
| 1979 | 39° | 23° | 31° | — | — |
| 1978 | 40° | 24° | 32° | 0.08" | 0.4" |
| 1977 | 28° | 17° | 23° | 0.18" | 1.6" |
| 1976 | 20° | 4° | 12° | 0.03" | 0.1" |
| 1975 | 25° | 14° | 19° | — | — |
| 1974 | 30° | 21° | 26° | 0.69" | 3.3" |
| 1973 | 25° | 10° | 17° | — | — |
| 1972 | 36° | 33° | 34° | 0.03" | — |
| 1971 | 36° | 31° | 33° | — | — |