Weather on December 21
Greeley, CO
55 Years of Data
Avg High
43°F
Avg Low
16°F
Warmest
2023
49°F avg
Coldest
1983
-10°F avg
About This Date
December 21st in Greeley, CO typically brings chilly winter weather, with average highs around 43°F and lows near 16°F — a 27°F daily swing. Over 55 years of records, the warmest December 21st was in 2023 (49°F average), while the coldest was 1983 (-10°F) — a 59°F range across recorded history. Precipitation has occurred on 11% of recorded December 21st dates, with snow falling 11% of the time (heaviest snowfall: 8.2"). The last decade has been 11.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 11.4°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Greeley, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 52° | 24° | 38° | — | — |
| 2024 | 61° | 24° | 42° | — | — |
| 2023warmest | 65° | 33° | 49° | — | — |
| 2022 | 55° | 2° | 28° | — | — |
| 2021 | 66° | 19° | 43° | — | — |
| 2020 | 55° | 29° | 42° | — | — |
| 2019 | 50° | 18° | 34° | — | — |
| 2018 | 63° | 19° | 41° | — | — |
| 2017 | 57° | 16° | 36° | 0.56" | 1.8" |
| 2016 | 47° | 31° | 39° | — | — |
| 2015 | 39° | 13° | 26° | — | — |
| 2014 | 50° | 17° | 34° | — | — |
| 2013 | 36° | 13° | 24° | — | — |
| 2012 | 52° | 18° | 35° | — | — |
| 2011 | 41° | 15° | 28° | — | — |
| 2010 | 43° | 24° | 33° | — | — |
| 2009 | 61° | 26° | 43° | — | — |
| 2008 | 26° | 1° | 14° | — | — |
| 2007 | 39° | 14° | 27° | — | — |
| 2006 | 39° | 22° | 30° | 2.67" | 8.2" |
| 2005 | 58° | 20° | 39° | — | — |
| 2004 | 39° | 23° | 31° | — | — |
| 2003 | 48° | 29° | 38° | — | — |
| 2002 | 40° | 25° | 32° | — | — |
| 2001 | 52° | 19° | 35° | — | — |
| 2000 | 30° | 5° | 18° | — | — |
| 1999 | 37° | 15° | 26° | — | — |
| 1998 | 5° | -4° | 1° | 0.28" | 1" |
| 1997 | 29° | 18° | 23° | — | — |
| 1996 | 44° | 26° | 35° | — | — |
| 1995 | 33° | 20° | 26° | 0.13" | 0.8" |
| 1994 | 62° | 21° | 42° | — | — |
| 1993 | 28° | 14° | 21° | 0.15" | 0.7" |
| 1992 | 34° | 10° | 22° | — | — |
| 1991 | 43° | 19° | 31° | — | — |
| 1990 | -7° | -13° | -10° | — | — |
| 1989 | 1° | -5° | -2° | 0.2" | 1" |
| 1988 | 40° | 16° | 28° | — | — |
| 1987 | 47° | 9° | 28° | — | — |
| 1986 | 45° | 17° | 31° | — | — |
| 1985 | 43° | 19° | 31° | — | — |
| 1984 | 41° | 15° | 28° | — | — |
| 1983coldest | -2° | -18° | -10° | — | — |
| 1982 | 54° | 22° | 38° | — | — |
| 1981 | 47° | 34° | 40° | — | — |
| 1980 | 42° | 22° | 32° | — | — |
| 1979 | 44° | 20° | 32° | — | — |
| 1978 | 46° | 4° | 25° | — | — |
| 1977 | 53° | 10° | 32° | — | — |
| 1976 | 50° | 8° | 29° | — | — |
| 1975 | 40° | 11° | 25° | — | — |
| 1974 | 56° | 26° | 41° | — | — |
| 1973 | 47° | 15° | 31° | — | — |
| 1972 | 42° | 16° | 29° | — | — |
| 1971 | 54° | 19° | 36° | — | — |
55 years of data from GREELEY UNC