Weather on December 18
Arvada, CO
55 Years of Data
Avg High
46°F
Avg Low
17°F
Warmest
1980
55°F avg
Coldest
2016
-7°F avg
About This Date
December 18th in Arvada, 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 1980 (55°F average), while the coldest was 2016 (-7°F) — a 62°F range across recorded history. Precipitation has occurred on 7% of recorded December 18th dates, with snow falling 5% of the time (heaviest snowfall: 8"). The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for December 18th in Arvada, CO? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 23° | 47° | — | — |
| 2024 | 56° | 24° | 40° | — | — |
| 2023 | 61° | 19° | 40° | — | — |
| 2022 | 39° | 10° | 25° | — | — |
| 2021 | 43° | 2° | 22° | — | — |
| 2020 | 50° | 26° | 38° | — | — |
| 2019 | 45° | 14° | 29° | — | — |
| 2018 | 61° | 21° | 41° | — | — |
| 2017 | 40° | 14° | 27° | — | — |
| 2016coldest | 7° | -20° | -7° | — | — |
| 2015 | 26° | 1° | 14° | — | — |
| 2014 | 40° | 25° | 32° | — | — |
| 2013 | 65° | 34° | 49° | — | — |
| 2012 | 51° | 27° | 39° | — | — |
| 2011 | 59° | 30° | 45° | — | — |
| 2010 | 38° | 14° | 26° | — | — |
| 2009 | 33° | 16° | 24° | — | — |
| 2008 | 37° | 21° | 29° | — | — |
| 2007 | 44° | 22° | 33° | — | — |
| 2006 | 30° | 14° | 22° | — | — |
| 2005 | 34° | 0° | 17° | — | — |
| 2004 | 44° | 26° | 35° | — | — |
| 2003 | 50° | 19° | 35° | — | — |
| 2002 | 36° | 14° | 25° | — | — |
| 2001 | 61° | 27° | 44° | — | — |
| 2000 | 62° | 17° | 40° | — | — |
| 1999 | 42° | 25° | 33° | — | — |
| 1998 | 69° | 31° | 50° | — | — |
| 1997 | 59° | 25° | 42° | — | — |
| 1996 | 10° | -15° | -2° | — | — |
| 1995 | 30° | 20° | 25° | 0.2" | 1" |
| 1994 | 55° | 29° | 42° | — | — |
| 1993 | 43° | 12° | 27° | — | — |
| 1992 | 30° | 0° | 15° | — | — |
| 1991 | 48° | 14° | 31° | — | — |
| 1990 | 40° | 20° | 30° | — | — |
| 1989 | 25° | -8° | 9° | 0.61" | 4" |
| 1988 | 50° | 25° | 37° | — | — |
| 1987 | 40° | 15° | 27° | — | — |
| 1986 | 33° | 7° | 20° | — | — |
| 1985 | 46° | 18° | 32° | — | — |
| 1984 | 34° | 8° | 21° | — | — |
| 1983 | 16° | 0° | 8° | 0.05" | — |
| 1982 | 43° | 15° | 29° | — | — |
| 1981 | 39° | 8° | 24° | — | — |
| 1980warmest | 75° | 36° | 55° | — | — |
| 1979 | 67° | 38° | 52° | — | — |
| 1978 | 57° | 31° | 44° | — | — |
| 1977 | 57° | 19° | 38° | — | — |
| 1976 | 60° | 32° | 46° | — | — |
| 1975 | 51° | 4° | 27° | — | — |
| 1974 | 47° | 20° | 33° | — | — |
| 1973 | 49° | 15° | 32° | 1.4" | 8" |
| 1972 | 55° | 31° | 43° | — | — |
| 1971 | 59° | 23° | 41° | — | — |
55 years of data from WATERTON NORTH COLORADO