Weather on December 31
Greeley, CO
55 Years of Data
About This Date
December 31st in Greeley, CO typically brings cold winter weather, with average highs around 39°F and lows near 14°F — a 25°F daily swing. Over 54 years of records, the warmest December 31st was in 2025 (47°F average), while the coldest was 2014 (0°F) — a 47°F range across recorded history. Precipitation has occurred on 20% of recorded December 31st dates, with snow falling 24% of the time (heaviest snowfall: 8"). The last decade has been 4.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.6°F cooler on this date compared to 20-30 years ago.
Planning for December 31st in Greeley, CO? Bundle up with warm layers and protect extremities from the cold. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 64° | 30° | 47° | — | — |
| 2024 | 38° | 16° | 27° | — | — |
| 2023 | 51° | 23° | 37° | — | — |
| 2022 | 42° | 17° | 30° | — | — |
| 2021 | 45° | 19° | 32° | 0.84" | 4.1" |
| 2020 | 39° | 14° | 27° | — | — |
| 2019 | 41° | 11° | 26° | — | — |
| 2018 | 26° | 9° | 17° | 0.03" | 0.4" |
| 2017 | 20° | 8° | 14° | — | 0.2" |
| 2016 | 53° | 20° | 36° | — | — |
| 2015 | 27° | 8° | 17° | — | — |
| 2014coldest | 17° | -17° | 0° | — | — |
| 2013 | 59° | 23° | 41° | — | — |
| 2012 | 30° | 15° | 23° | — | — |
| 2011 | 54° | 30° | 42° | — | — |
| 2010 | 12° | 2° | 7° | 0.64" | 2.6" |
| 2009 | 37° | 9° | 23° | — | — |
| 2008 | 37° | 17° | 27° | — | — |
| 2007 | 33° | 12° | 23° | — | — |
| 2005 | 60° | 20° | 40° | — | — |
| 2004 | 52° | 28° | 40° | — | — |
| 2003 | 41° | 21° | 31° | — | — |
| 2002 | 42° | 17° | 30° | — | — |
| 2001 | 35° | 13° | 24° | — | — |
| 2000 | 32° | 18° | 25° | 0.36" | 1.5" |
| 1999 | 50° | 19° | 35° | — | — |
| 1998 | 38° | 28° | 33° | — | — |
| 1997 | 55° | 21° | 38° | — | — |
| 1996 | 57° | 28° | 43° | — | — |
| 1995 | 42° | 27° | 34° | 0.03" | 0.2" |
| 1994 | 21° | 4° | 12° | 0.15" | 0.7" |
| 1993 | 49° | 23° | 36° | — | — |
| 1992 | 25° | 12° | 18° | — | — |
| 1991 | 37° | 18° | 27° | 0.3" | 2" |
| 1990 | 44° | 6° | 25° | — | — |
| 1989 | 45° | 17° | 31° | — | — |
| 1988 | 43° | 7° | 25° | — | — |
| 1987 | 14° | -6° | 4° | — | — |
| 1986 | 43° | 19° | 31° | — | — |
| 1985 | 29° | 10° | 19° | — | — |
| 1984 | 42° | 26° | 34° | 0.25" | 1.7" |
| 1983 | 45° | 21° | 33° | 0.48" | 1.3" |
| 1982 | 41° | 7° | 24° | — | — |
| 1981 | 37° | 21° | 29° | — | — |
| 1980 | 59° | 26° | 43° | — | — |
| 1979 | 36° | -4° | 16° | — | — |
| 1978 | 13° | -7° | 3° | 0.05" | 0.3" |
| 1977 | 42° | 16° | 29° | — | 0.3" |
| 1976 | 26° | 1° | 14° | — | — |
| 1975 | 45° | 15° | 30° | 1.55" | 8" |
| 1974 | 39° | 20° | 29° | — | — |
| 1973 | 16° | 5° | 10° | — | — |
| 1972 | 30° | 6° | 18° | — | — |
| 1971 | 48° | 8° | 28° | — | — |