Weather on December 21
Greeley, CO
55 Years of Data
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.
| 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° | — | — |
Greeley, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Greeley, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Greeley, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Greeley, CO
Greeley, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.