Weather on December 21
Denver, CO
55 Years of Data
Avg High
47°F
Avg Low
19°F
Warmest
2003
51°F avg
Coldest
1983
-13°F avg
About This Date
December 21st in Denver, CO typically brings chilly winter weather, with average highs around 47°F and lows near 19°F — a 28°F daily swing. Over 55 years of records, the warmest December 21st was in 2003 (51°F average), while the coldest was 1983 (-13°F) — a 64°F range across recorded history. Precipitation has occurred on 15% of recorded December 21st dates, with snow falling 13% of the time (heaviest snowfall: 21.8"). The last decade has been 11.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 11.1°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
2.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 27° | 37° | — | — |
| 2024 | 71° | 23° | 47° | — | — |
| 2023 | 62° | 33° | 48° | — | — |
| 2022 | 53° | 17° | 35° | — | — |
| 2021 | 67° | 25° | 46° | — | — |
| 2020 | 53° | 41° | 47° | — | — |
| 2019 | 57° | 26° | 42° | — | — |
| 2018 | 53° | 25° | 39° | — | — |
| 2017 | 67° | 20° | 43° | 0.2" | 0.7" |
| 2016 | 60° | 23° | 42° | — | — |
| 2015 | 53° | 25° | 39° | — | — |
| 2014 | 53° | 27° | 40° | — | — |
| 2013 | 22° | 13° | 17° | — | — |
| 2012 | 51° | 20° | 35° | — | — |
| 2011 | 45° | 18° | 31° | — | — |
| 2010 | 56° | 23° | 39° | — | — |
| 2009 | 59° | 28° | 44° | — | — |
| 2008 | 27° | 0° | 13° | — | — |
| 2007 | 53° | 27° | 40° | — | — |
| 2006 | 27° | 22° | 24° | 3.78" | 21.8" |
| 2005 | 52° | 29° | 40° | — | — |
| 2004 | 58° | 28° | 43° | — | — |
| 2003warmest | 68° | 33° | 51° | — | — |
| 2002 | 46° | 20° | 33° | — | — |
| 2001 | 58° | 18° | 38° | — | — |
| 2000 | 30° | 3° | 17° | — | — |
| 1999 | 35° | 18° | 26° | 0.08" | 1" |
| 1998 | 10° | -9° | 1° | 0.2" | 2" |
| 1997 | 44° | 17° | 31° | — | — |
| 1996 | 45° | 26° | 35° | — | — |
| 1995 | 33° | 14° | 24° | — | — |
| 1994 | 62° | 28° | 45° | — | — |
| 1993 | 38° | 13° | 25° | 0.13" | 1.5" |
| 1992 | 44° | 16° | 30° | — | — |
| 1991 | 54° | 20° | 37° | — | — |
| 1990 | -5° | -22° | -13° | — | — |
| 1989 | 4° | -13° | -5° | 0.18" | 0.8" |
| 1988 | 44° | 18° | 31° | — | — |
| 1987 | 48° | — | — | — | — |
| 1986 | 44° | 18° | 31° | — | — |
| 1985 | 56° | 27° | 41° | — | — |
| 1984 | 39° | 9° | 24° | — | — |
| 1983coldest | -4° | -23° | -13° | 0.08" | 0.6" |
| 1982 | 63° | 23° | 43° | — | — |
| 1981 | 55° | 35° | 45° | 0.05" | — |
| 1980 | 58° | 24° | 41° | — | — |
| 1979 | 53° | 22° | 37° | — | — |
| 1978 | 49° | 16° | 32° | — | — |
| 1977 | 52° | 7° | 29° | — | — |
| 1976 | 57° | 8° | 33° | — | — |
| 1975 | 43° | 18° | 30° | — | — |
| 1974 | 56° | 25° | 40° | — | — |
| 1973 | 49° | 23° | 36° | — | — |
| 1972 | 53° | 27° | 40° | — | — |
| 1971 | 58° | 24° | 41° | — | — |
55 years of data from NORTHGLENN