Weather on December 18
Greeley, CO
55 Years of Data
Avg High
41°F
Avg Low
16°F
Warmest
2025
46°F avg
Coldest
1983
3°F avg
About This Date
December 18th in Greeley, CO typically brings chilly winter weather, with average highs around 41°F and lows near 16°F — a 25°F daily swing. Over 55 years of records, the warmest December 18th was in 2025 (46°F average), while the coldest was 1983 (3°F) — a 43°F range across recorded history. Precipitation has occurred on 9% of recorded December 18th dates, with snow falling 7% of the time (heaviest snowfall: 1.3"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 18th in Greeley, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 59° | 32° | 46° | — | — |
| 2024 | 43° | 18° | 30° | — | — |
| 2023 | 52° | 21° | 36° | — | — |
| 2022 | 37° | 6° | 22° | — | — |
| 2021 | 39° | 7° | 23° | — | — |
| 2020 | 40° | 22° | 31° | — | — |
| 2019 | 50° | 13° | 31° | — | — |
| 2018 | 58° | 19° | 38° | — | — |
| 2017 | 49° | 12° | 30° | — | — |
| 2016 | 17° | -12° | 3° | — | — |
| 2015 | 32° | 2° | 17° | — | — |
| 2014 | 44° | 20° | 32° | — | — |
| 2013 | 56° | 31° | 43° | — | — |
| 2012 | 49° | 34° | 41° | — | — |
| 2011 | 52° | 17° | 34° | — | — |
| 2010 | 36° | 16° | 26° | — | — |
| 2009 | 48° | 28° | 38° | — | — |
| 2008 | 30° | 10° | 20° | 0.25" | 0.1" |
| 2007 | 41° | 17° | 29° | — | — |
| 2006 | 34° | 17° | 25° | — | — |
| 2005 | 17° | 8° | 13° | 0.03" | 0.1" |
| 2004 | 48° | 24° | 36° | — | — |
| 2003 | 42° | 20° | 31° | — | — |
| 2002 | 41° | 23° | 32° | — | — |
| 2001 | 55° | 23° | 39° | — | — |
| 2000 | 36° | 23° | 29° | — | — |
| 1999 | 53° | 19° | 36° | — | — |
| 1998 | 41° | 16° | 28° | — | — |
| 1997 | 50° | 24° | 37° | — | — |
| 1996 | 20° | -1° | 10° | — | — |
| 1995 | 37° | 26° | 32° | — | — |
| 1994 | 54° | 19° | 36° | — | — |
| 1993 | 37° | 11° | 24° | — | — |
| 1992 | 28° | 6° | 17° | 0.1" | 0.5" |
| 1991 | 29° | 18° | 23° | — | — |
| 1990 | 46° | 19° | 33° | — | — |
| 1989 | 12° | -4° | 4° | 0.25" | 1.3" |
| 1988 | 46° | 12° | 29° | — | — |
| 1987 | 37° | 18° | 27° | — | — |
| 1986 | 46° | 11° | 28° | — | — |
| 1985 | 36° | 22° | 29° | — | — |
| 1984 | 31° | 5° | 18° | — | — |
| 1983coldest | 11° | -5° | 3° | — | — |
| 1982 | 42° | 32° | 37° | — | — |
| 1981 | 34° | 2° | 18° | — | — |
| 1980 | 50° | 24° | 37° | — | — |
| 1979 | 59° | 20° | 39° | — | — |
| 1978 | 39° | 16° | 27° | — | — |
| 1977 | 55° | 21° | 38° | — | — |
| 1976 | 60° | 19° | 40° | — | — |
| 1975 | 34° | -6° | 14° | — | — |
| 1974 | 49° | 27° | 38° | — | — |
| 1973 | 43° | 14° | 28° | 0.94" | — |
| 1972 | 48° | 27° | 37° | — | — |
| 1971 | 46° | 17° | 32° | — | — |
55 years of data from GREELEY UNC