Weather on December 20
Denver, CO
55 Years of Data
Avg High
46°F
Avg Low
17°F
Warmest
2025
54°F avg
Coldest
1990
-10°F avg
About This Date
December 20th in Denver, CO typically brings chilly winter weather, with average highs around 46°F and lows near 17°F — a 29°F daily swing. Over 55 years of records, the warmest December 20th was in 2025 (54°F average), while the coldest was 1990 (-10°F) — a 64°F range across recorded history. Precipitation has occurred on 9% of recorded December 20th dates, with snow falling 9% of the time (heaviest snowfall: 1.3"). The last decade has been 10.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.5°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Denver, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
2.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 74° | 34° | 54° | — | — |
| 2024 | 65° | 22° | 43° | — | — |
| 2023 | 69° | 34° | 51° | — | — |
| 2022 | 52° | 17° | 34° | — | — |
| 2021 | 65° | 26° | 45° | — | — |
| 2020 | 47° | 22° | 34° | — | — |
| 2019 | 49° | 21° | 35° | — | — |
| 2018 | 54° | 23° | 38° | — | — |
| 2017 | 56° | 28° | 42° | — | — |
| 2016 | 51° | 22° | 36° | — | — |
| 2015 | 60° | 23° | 42° | — | — |
| 2014 | 48° | 19° | 34° | — | — |
| 2013 | 47° | 14° | 30° | — | — |
| 2012 | 30° | 12° | 21° | — | — |
| 2011 | 34° | 18° | 26° | 0.03" | 1" |
| 2010 | 58° | 22° | 40° | — | — |
| 2009 | 51° | 16° | 33° | — | — |
| 2008 | 51° | 19° | 35° | — | — |
| 2007 | 53° | 29° | 41° | — | — |
| 2006 | 44° | 22° | 33° | 0.13" | 0.4" |
| 2005 | 47° | 9° | 28° | — | — |
| 2004 | 64° | 30° | 47° | — | — |
| 2003 | 68° | 27° | 47° | — | — |
| 2002 | 47° | 19° | 33° | — | — |
| 2001 | 46° | 22° | 34° | — | — |
| 2000 | 43° | 11° | 27° | 0.2" | 1.3" |
| 1999 | 32° | 15° | 24° | — | — |
| 1998 | 6° | -3° | 2° | 0.3" | 1.2" |
| 1997 | 40° | 20° | 30° | — | — |
| 1996 | 48° | 21° | 35° | — | — |
| 1995 | 36° | 11° | 23° | — | — |
| 1994 | 56° | 20° | 38° | — | — |
| 1993 | 37° | 6° | 22° | — | — |
| 1992 | 40° | 2° | 21° | — | — |
| 1991 | 35° | 28° | 32° | — | — |
| 1990coldest | -4° | -17° | -10° | 0.15" | 1" |
| 1989 | 47° | 0° | 23° | — | — |
| 1988 | 44° | 24° | 34° | — | — |
| 1987 | 34° | 15° | 24° | — | — |
| 1986 | 44° | 19° | 32° | — | — |
| 1985 | 51° | 21° | 36° | — | — |
| 1984 | 47° | 16° | 31° | — | — |
| 1983 | 7° | -8° | 0° | — | — |
| 1982 | 54° | 23° | 38° | — | — |
| 1981 | 65° | 37° | 51° | — | — |
| 1980 | 26° | 16° | 21° | — | — |
| 1979 | 55° | 24° | 40° | — | — |
| 1978 | 37° | 15° | 26° | — | — |
| 1977 | 35° | 8° | 22° | — | — |
| 1976 | 44° | 6° | 25° | — | — |
| 1975 | 55° | 17° | 36° | — | — |
| 1974 | 43° | 9° | 26° | — | — |
| 1973 | 40° | -8° | 16° | — | — |
| 1972 | 49° | 32° | 40° | — | — |
| 1971 | 55° | 27° | 41° | — | — |
55 years of data from NORTHGLENN