Weather on December 21
Arvada, CO
55 Years of Data
Avg High
45°F
Avg Low
16°F
Warmest
1981
51°F avg
Coldest
1990
-13°F avg
About This Date
December 21st in Arvada, CO typically brings chilly winter weather, with average highs around 45°F and lows near 16°F — a 29°F daily swing. Over 55 years of records, the warmest December 21st was in 1981 (51°F average), while the coldest was 1990 (-13°F) — a 64°F range across recorded history. Precipitation has occurred on 11% of recorded December 21st dates, with snow falling 5% of the time (heaviest snowfall: 8"). The last decade has been 13.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 13.3°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Arvada, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 22° | 35° | — | — |
| 2024 | 65° | 28° | 46° | — | — |
| 2023 | 58° | 30° | 44° | — | — |
| 2022 | 52° | 15° | 33° | — | — |
| 2021 | 61° | 21° | 41° | — | — |
| 2020 | 50° | 10° | 30° | — | — |
| 2019 | 54° | 27° | 40° | — | — |
| 2018 | 52° | 22° | 37° | — | — |
| 2017 | 67° | 21° | 44° | 0.13" | 1" |
| 2016 | 61° | 24° | 42° | — | — |
| 2015 | 52° | 20° | 36° | — | — |
| 2014 | 43° | 20° | 31° | — | — |
| 2013 | 25° | 10° | 17° | — | — |
| 2012 | 51° | 18° | 34° | — | — |
| 2011 | 35° | 16° | 25° | — | — |
| 2010 | 35° | 19° | 27° | — | — |
| 2009 | 50° | 29° | 39° | — | — |
| 2008 | 31° | 4° | 17° | — | — |
| 2007 | 34° | 9° | 21° | — | — |
| 2006 | 29° | 13° | 21° | — | — |
| 2005 | 56° | 35° | 45° | — | — |
| 2004 | 31° | 11° | 21° | — | — |
| 2003 | 48° | 26° | 37° | — | — |
| 2002 | 33° | 11° | 22° | — | — |
| 2001 | 47° | 20° | 33° | — | — |
| 2000 | 32° | 1° | 17° | 0.03" | — |
| 1999 | 35° | 17° | 26° | — | — |
| 1998 | 4° | -3° | 1° | 0.97" | 8" |
| 1997 | 41° | 9° | 25° | — | — |
| 1996 | 54° | 11° | 32° | — | — |
| 1995 | 25° | 9° | 17° | — | — |
| 1994 | 50° | 27° | 38° | — | — |
| 1993 | 44° | 11° | 27° | — | — |
| 1992 | 51° | 8° | 30° | — | — |
| 1991 | 41° | 17° | 29° | — | — |
| 1990coldest | 4° | -29° | -13° | 0.15" | 2" |
| 1989 | 52° | -1° | 26° | — | — |
| 1988 | 42° | 23° | 33° | — | — |
| 1987 | 38° | 4° | 21° | — | — |
| 1986 | 41° | 14° | 28° | — | — |
| 1985 | 54° | 23° | 38° | — | — |
| 1984 | 40° | 24° | 32° | — | — |
| 1983 | 6° | -25° | -9° | 0.25" | — |
| 1982 | 63° | 23° | 43° | — | — |
| 1981warmest | 67° | 35° | 51° | 0.15" | — |
| 1980 | 39° | 15° | 27° | — | — |
| 1979 | 57° | 31° | 44° | — | — |
| 1978 | 55° | 18° | 36° | — | — |
| 1977 | 57° | 21° | 39° | — | — |
| 1976 | 53° | 12° | 33° | — | — |
| 1975 | 48° | 22° | 35° | — | — |
| 1974 | 55° | 29° | 42° | — | — |
| 1973 | 50° | 26° | 38° | — | — |
| 1972 | 52° | 29° | 40° | — | — |
| 1971 | 55° | 24° | 40° | — | — |
55 years of data from WATERTON NORTH COLORADO