Weather on December 18
Fort Collins, CO
55 Years of Data
Avg High
43°F
Avg Low
17°F
Warmest
1979
43°F avg
Coldest
1983
4°F avg
About This Date
December 18th in Fort Collins, CO typically brings chilly winter weather, with average highs around 43°F and lows near 17°F — a 26°F daily swing. Over 55 years of records, the warmest December 18th was in 1979 (43°F average), while the coldest was 1983 (4°F) — a 39°F range across recorded history. Precipitation has occurred on 13% of recorded December 18th dates, with snow falling 15% of the time (heaviest snowfall: 5.9"). 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 Fort Collins, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 49° | 33° | 41° | — | — |
| 2024 | 44° | 19° | 32° | — | — |
| 2023 | 51° | 20° | 35° | — | — |
| 2022 | 39° | 6° | 23° | — | — |
| 2021 | 35° | 8° | 22° | — | — |
| 2020 | 42° | 23° | 33° | — | — |
| 2019 | 50° | 10° | 30° | — | — |
| 2018 | 56° | 25° | 40° | — | — |
| 2017 | 54° | 19° | 36° | — | — |
| 2016 | 28° | -9° | 10° | — | — |
| 2015 | 40° | 5° | 22° | — | — |
| 2014 | 45° | 17° | 31° | — | — |
| 2013 | 56° | 29° | 42° | — | — |
| 2012 | 46° | 26° | 36° | 0.15" | 2.4" |
| 2011 | 55° | 17° | 36° | — | — |
| 2010 | 36° | 17° | 26° | — | — |
| 2009 | 47° | 26° | 36° | — | — |
| 2008 | 36° | 11° | 23° | — | — |
| 2007 | 42° | 17° | 30° | — | — |
| 2006 | 35° | 11° | 23° | — | — |
| 2005 | 18° | 7° | 12° | 0.03" | 0.2" |
| 2004 | 47° | 24° | 35° | — | — |
| 2003 | 45° | 21° | 33° | — | — |
| 2002 | 41° | 22° | 31° | — | — |
| 2001 | 43° | 23° | 33° | — | — |
| 2000 | 38° | 27° | 32° | 0.03" | 0.1" |
| 1999 | 52° | 19° | 35° | — | — |
| 1998 | 60° | 11° | 35° | 0.1" | 0.5" |
| 1997 | 54° | 22° | 38° | — | — |
| 1996 | 23° | 4° | 13° | — | — |
| 1995 | 36° | 22° | 29° | — | — |
| 1994 | 58° | 19° | 38° | — | — |
| 1993 | 38° | 10° | 24° | — | — |
| 1992 | 33° | 13° | 23° | 0.05" | 0.3" |
| 1991 | 32° | 15° | 24° | — | — |
| 1990 | 45° | 20° | 32° | — | — |
| 1989 | 20° | 1° | 10° | 0.41" | 2.4" |
| 1988 | 52° | 13° | 32° | — | — |
| 1987 | 39° | 18° | 28° | — | — |
| 1986 | 44° | 11° | 27° | — | — |
| 1985 | 42° | 23° | 33° | — | — |
| 1984 | 35° | 7° | 21° | — | — |
| 1983coldest | 10° | -2° | 4° | — | 0.3" |
| 1982 | 52° | 33° | 42° | — | — |
| 1981 | 35° | 6° | 21° | — | — |
| 1980 | 51° | 27° | 39° | — | — |
| 1979warmest | 62° | 23° | 43° | — | — |
| 1978 | 42° | 21° | 32° | — | — |
| 1977 | 52° | 20° | 36° | — | — |
| 1976 | 59° | 17° | 38° | — | — |
| 1975 | 38° | -5° | 16° | — | — |
| 1974 | 43° | 24° | 33° | — | — |
| 1973 | 41° | 20° | 30° | 1.22" | 5.9" |
| 1972 | 50° | 30° | 40° | — | — |
| 1971 | 44° | 19° | 32° | — | — |
55 years of data from FT COLLINS