Weather on December 23
Boulder, CO
55 Years of Data
Avg High
42°F
Avg Low
20°F
Warmest
2021
53°F avg
Coldest
1989
-6°F avg
About This Date
December 23rd in Boulder, CO typically brings chilly winter weather, with average highs around 42°F and lows near 20°F. Over 55 years of records, the warmest December 23rd was in 2021 (53°F average), while the coldest was 1989 (-6°F) — a 59°F range across recorded history. Precipitation has occurred on 22% of recorded December 23rd dates, with snow falling 22% of the time (heaviest snowfall: 5.9"). The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
Planning for December 23rd in Boulder, CO? Bring layers as temperatures can vary throughout the day. Check road conditions if traveling, as snow is possible.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 39° | 50° | — | — |
| 2024 | 46° | 36° | 41° | — | — |
| 2023 | 54° | 34° | 44° | — | — |
| 2022 | 10° | -9° | 1° | 0.05" | — |
| 2021warmest | 61° | 45° | 53° | — | — |
| 2020 | 32° | 19° | 26° | — | — |
| 2019 | 55° | 37° | 46° | — | — |
| 2018 | 50° | 19° | 35° | — | — |
| 2017 | 37° | 11° | 24° | — | — |
| 2016 | 59° | 24° | 42° | — | — |
| 2015 | 41° | 20° | 30° | — | 0.1" |
| 2014 | 40° | 22° | 31° | — | — |
| 2013 | 43° | 19° | 31° | 0.03" | 0.2" |
| 2012 | 51° | 25° | 38° | — | — |
| 2011 | 44° | 5° | 25° | — | — |
| 2010 | 50° | 19° | 35° | — | — |
| 2009 | 36° | 22° | 29° | 1.14" | 5.9" |
| 2008 | 40° | 12° | 26° | — | — |
| 2007 | 44° | 15° | 30° | — | — |
| 2006 | 44° | 15° | 30° | — | — |
| 2005 | 59° | 43° | 51° | — | — |
| 2004 | 18° | -3° | 8° | 0.36" | 2.4" |
| 2003 | 51° | 22° | 36° | — | — |
| 2002 | 28° | 18° | 23° | 0.03" | 0.3" |
| 2001 | 44° | 13° | 28° | — | — |
| 2000 | 46° | 23° | 35° | — | — |
| 1999 | 54° | 27° | 40° | — | — |
| 1998 | 17° | -7° | 5° | — | — |
| 1997 | 41° | 17° | 29° | — | — |
| 1996 | 38° | 17° | 27° | 0.03" | 0.2" |
| 1995 | 37° | 6° | 22° | — | — |
| 1994 | 46° | 25° | 35° | — | — |
| 1993 | 27° | 17° | 22° | 0.05" | 0.3" |
| 1992 | 41° | 20° | 30° | — | — |
| 1991 | 47° | 27° | 37° | — | — |
| 1990 | 20° | -13° | 3° | — | — |
| 1989coldest | 12° | -25° | -6° | — | — |
| 1988 | 38° | 16° | 27° | — | — |
| 1987 | 31° | 18° | 24° | 0.51" | 3.7" |
| 1986 | 53° | 23° | 38° | — | — |
| 1985 | 54° | 34° | 44° | — | — |
| 1984 | 54° | 23° | 38° | — | — |
| 1983 | 2° | -10° | -4° | 0.51" | 3" |
| 1982 | 51° | 31° | 41° | — | — |
| 1981 | 27° | 7° | 17° | 0.1" | 0.8" |
| 1980 | 54° | 40° | 47° | — | — |
| 1979 | 40° | 30° | 35° | — | — |
| 1978 | 45° | 18° | 31° | — | — |
| 1977 | 54° | 41° | 47° | — | — |
| 1976 | 51° | 17° | 34° | — | — |
| 1975 | 38° | 22° | 30° | — | — |
| 1974 | 27° | 15° | 21° | 0.28" | 1.8" |
| 1973 | 41° | 29° | 35° | 0.15" | 0.3" |
| 1972 | 52° | 38° | 45° | — | — |
| 1971 | 63° | 42° | 52° | — | — |
55 years of data from BOULDER MUNI AP