Weather on December 17
Boulder, CO
55 Years of Data
Avg High
46°F
Avg Low
22°F
Warmest
1980
65°F avg
Coldest
1996
7°F avg
About This Date
December 17th in Boulder, CO typically brings chilly winter weather, with average highs around 46°F and lows near 22°F. Over 55 years of records, the warmest December 17th was in 1980 (65°F average), while the coldest was 1996 (7°F) — a 58°F range across recorded history. Precipitation has occurred on 20% of recorded December 17th dates, with snow falling 20% of the time (heaviest snowfall: 5.2"). The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Boulder, CO? Bring layers as temperatures can vary throughout the day. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 39° | 54° | — | — |
| 2024 | 50° | 28° | 39° | — | — |
| 2023 | 63° | 32° | 47° | — | — |
| 2022 | 36° | 18° | 27° | — | — |
| 2021 | 43° | 19° | 31° | — | — |
| 2020 | 43° | 23° | 33° | — | — |
| 2019 | 39° | 19° | 29° | — | — |
| 2018 | 55° | 30° | 43° | — | — |
| 2017 | 40° | 29° | 34° | — | — |
| 2016 | 26° | -7° | 10° | 1.02" | 5.2" |
| 2015 | 27° | 8° | 17° | — | — |
| 2014 | 46° | 20° | 33° | — | — |
| 2013 | 63° | 31° | 47° | — | — |
| 2012 | 46° | 24° | 35° | — | — |
| 2011 | 45° | 20° | 32° | — | — |
| 2010 | 32° | 20° | 26° | 0.1" | 1.1" |
| 2009 | 53° | 32° | 43° | — | — |
| 2008 | 40° | 1° | 20° | — | — |
| 2007 | 54° | 19° | 36° | — | — |
| 2006 | 38° | 24° | 31° | — | — |
| 2005 | 20° | 11° | 15° | 0.1" | 2" |
| 2004 | 48° | 26° | 37° | — | — |
| 2003 | 59° | 35° | 47° | — | — |
| 2002 | 51° | 37° | 44° | — | — |
| 2001 | 60° | 25° | 42° | — | — |
| 2000 | 58° | 21° | 39° | — | — |
| 1999 | 49° | 30° | 39° | — | — |
| 1998 | 63° | 25° | 44° | — | — |
| 1997 | 61° | 33° | 47° | — | — |
| 1996coldest | 18° | -4° | 7° | 0.28" | 2.1" |
| 1995 | 39° | 26° | 33° | 0.08" | 0.7" |
| 1994 | 56° | 28° | 42° | — | — |
| 1993 | 36° | 10° | 23° | 0.03" | 0.1" |
| 1992 | 33° | 6° | 20° | — | — |
| 1991 | 50° | 25° | 37° | — | — |
| 1990 | 37° | 25° | 31° | 0.2" | 1.2" |
| 1989 | 22° | -6° | 8° | 0.13" | 2" |
| 1988 | 53° | 24° | 39° | — | — |
| 1987 | 43° | 14° | 28° | — | — |
| 1986 | 45° | 24° | 34° | — | — |
| 1985 | 48° | 38° | 43° | — | — |
| 1984 | 33° | 10° | 22° | — | — |
| 1983 | 12° | 4° | 8° | 0.1" | 0.5" |
| 1982 | 69° | 34° | 51° | — | — |
| 1981 | 35° | 13° | 24° | 0.46" | 2.5" |
| 1980warmest | 76° | 55° | 65° | — | — |
| 1979 | 70° | 18° | 44° | — | — |
| 1978 | 33° | 10° | 22° | — | — |
| 1977 | 43° | 26° | 34° | — | — |
| 1976 | 60° | 32° | 46° | — | — |
| 1975 | 21° | 8° | 15° | 0.48" | 4.6" |
| 1974 | 56° | 35° | 45° | — | — |
| 1973 | 58° | 46° | 52° | — | — |
| 1972 | 54° | 19° | 36° | — | — |
| 1971 | 52° | 18° | 35° | — | — |
55 years of data from BOULDER MUNI AP