Weather on December 18
Denver, CO
55 Years of Data
Avg High
46°F
Avg Low
17°F
Warmest
2025
51°F avg
Coldest
2016
-4°F avg
About This Date
December 18th in Denver, CO typically brings chilly winter weather, with average highs around 46°F and lows near 17°F — a 29°F daily swing. Over 55 years of records, the warmest December 18th was in 2025 (51°F average), while the coldest was 2016 (-4°F) — a 55°F range across recorded history. Precipitation has occurred on 5% of recorded December 18th dates, with snow falling 9% of the time. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Denver, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 72° | 30° | 51° | — | — |
| 2024 | 58° | 21° | 39° | — | — |
| 2023 | 67° | 21° | 44° | — | — |
| 2022 | 41° | 13° | 27° | — | — |
| 2021 | 45° | 7° | 26° | — | — |
| 2020 | 50° | 29° | 39° | — | — |
| 2019 | 49° | 19° | 34° | — | — |
| 2018 | 63° | 24° | 43° | — | — |
| 2017 | 41° | 18° | 29° | — | — |
| 2016coldest | 2° | -10° | -4° | — | — |
| 2015 | 25° | 5° | 15° | — | — |
| 2014 | 44° | 19° | 32° | — | — |
| 2013 | 67° | 28° | 47° | — | — |
| 2012 | 53° | 30° | 42° | — | — |
| 2011 | 48° | 19° | 34° | — | — |
| 2010 | 29° | 14° | 21° | — | — |
| 2009 | 56° | 22° | 39° | — | — |
| 2008 | 45° | 11° | 28° | — | — |
| 2007 | 55° | 13° | 34° | — | — |
| 2006 | 32° | 19° | 26° | — | — |
| 2005 | 16° | 8° | 12° | — | — |
| 2004 | 50° | 27° | 38° | — | — |
| 2003 | 60° | 19° | 40° | — | — |
| 2002 | 47° | 23° | 35° | — | 0.1" |
| 2001 | 45° | 23° | 34° | — | — |
| 2000 | 40° | 21° | 30° | — | — |
| 1999 | 58° | 22° | 40° | — | — |
| 1998 | 54° | 7° | 30° | 0.05" | 0.1" |
| 1997 | 49° | 26° | 37° | — | — |
| 1996 | 20° | -7° | 6° | — | — |
| 1995 | 28° | 14° | 21° | — | — |
| 1994 | 63° | 25° | 44° | — | — |
| 1993 | 40° | 12° | 26° | — | — |
| 1992 | 36° | 14° | 25° | 0.08" | 1" |
| 1991 | 38° | 18° | 28° | — | — |
| 1990 | 46° | 23° | 35° | — | — |
| 1989 | 16° | -2° | 7° | — | 0.8" |
| 1988 | 61° | 28° | 44° | — | — |
| 1987 | 38° | 17° | 27° | — | — |
| 1986 | 47° | 14° | 30° | — | — |
| 1985 | 52° | 10° | 31° | — | — |
| 1984 | 39° | 11° | 25° | — | — |
| 1983 | 12° | -9° | 2° | 0.05" | 0.4" |
| 1982 | 53° | 25° | 39° | — | — |
| 1981 | 34° | 3° | 18° | — | — |
| 1980 | 64° | 26° | 45° | — | — |
| 1979 | 62° | 29° | 45° | — | — |
| 1978 | 40° | 18° | 29° | — | — |
| 1977 | 59° | 24° | 42° | — | — |
| 1976 | 66° | 22° | 44° | — | — |
| 1975 | 45° | -5° | 20° | — | — |
| 1974 | 48° | 18° | 33° | — | — |
| 1973 | 43° | 16° | 29° | — | — |
| 1972 | 52° | 30° | 41° | — | — |
| 1971 | 58° | 29° | 43° | — | — |
55 years of data from NORTHGLENN