Weather on December 21
Denver, CO
55 Years of Data
Avg High
45°F
Avg Low
20°F
Warmest
1981
49°F avg
Coldest
1990
-11°F avg
About This Date
December 21st in Denver, CO typically brings chilly winter weather, with average highs around 45°F and lows near 20°F — a 25°F daily swing. Over 55 years of records, the warmest December 21st was in 1981 (49°F average), while the coldest was 1990 (-11°F) — a 60°F range across recorded history. Precipitation has occurred on 9% of recorded December 21st dates, with snow falling 7% of the time (heaviest snowfall: 21.5"). The last decade has been 12.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 12.8°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Denver, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 45° | 25° | 35° | — | — |
| 2024 | 67° | 25° | 46° | — | — |
| 2023 | 57° | 38° | 47° | — | — |
| 2022 | 48° | 22° | 35° | — | — |
| 2021 | 61° | 28° | 44° | — | — |
| 2020 | 54° | 34° | 44° | — | — |
| 2019 | 53° | 26° | 40° | — | — |
| 2018 | 50° | 27° | 38° | — | — |
| 2017 | 63° | 16° | 39° | 0.2" | 0.8" |
| 2016 | 59° | 35° | 47° | — | — |
| 2015 | 58° | 27° | 42° | — | — |
| 2014 | 48° | 30° | 39° | — | — |
| 2013 | 23° | 13° | 18° | — | — |
| 2012 | 47° | 14° | 30° | — | — |
| 2011 | 43° | 18° | 30° | — | — |
| 2010 | 64° | 24° | 44° | — | — |
| 2009 | 60° | 30° | 45° | — | — |
| 2008 | 32° | 3° | 18° | — | — |
| 2007 | 57° | 30° | 44° | — | — |
| 2006 | 30° | 22° | 26° | 3.66" | 21.5" |
| 2005 | 54° | 27° | 40° | — | — |
| 2004 | 57° | 19° | 38° | — | — |
| 2003 | 60° | 34° | 47° | — | — |
| 2002 | 38° | 18° | 28° | — | — |
| 2001 | 44° | 17° | 31° | — | — |
| 2000 | 30° | 0° | 15° | 0.1" | 1" |
| 1999 | 35° | 12° | 24° | — | — |
| 1998 | 6° | -8° | -1° | 0.66" | — |
| 1997 | 42° | 14° | 28° | — | — |
| 1996 | 49° | 25° | 37° | — | — |
| 1995 | 40° | 16° | 28° | — | — |
| 1994 | 56° | 28° | 42° | — | — |
| 1993 | 40° | 10° | 25° | — | — |
| 1992 | 46° | 17° | 32° | — | — |
| 1991 | 33° | 20° | 26° | — | — |
| 1990coldest | -4° | -18° | -11° | 0.05" | 0.5" |
| 1989 | 35° | -5° | 15° | — | — |
| 1988 | 43° | 14° | 28° | — | — |
| 1987 | 42° | 16° | 29° | — | — |
| 1986 | 42° | 20° | 31° | — | — |
| 1985 | 53° | 26° | 40° | — | — |
| 1984 | 50° | 28° | 39° | — | — |
| 1983 | -2° | -17° | -9° | — | — |
| 1982 | 62° | 33° | 48° | — | — |
| 1981warmest | 65° | 34° | 49° | — | — |
| 1980 | 33° | 21° | 27° | — | — |
| 1979 | 56° | 30° | 43° | — | — |
| 1978 | 39° | 24° | 32° | — | — |
| 1977 | 34° | 21° | 27° | — | — |
| 1976 | 45° | 19° | 32° | — | — |
| 1975 | 51° | 27° | 39° | — | — |
| 1974 | 47° | 25° | 36° | — | — |
| 1973 | 52° | 21° | 36° | — | — |
| 1972 | 46° | 26° | 36° | — | — |
| 1971 | 53° | 26° | 40° | — | — |
55 years of data from LAKEWOOD