Weather on December 11
Boulder, CO
55 Years of Data
Avg High
49°F
Avg Low
24°F
Warmest
2025
60°F avg
Coldest
1985
7°F avg
About This Date
December 11th in Boulder, CO typically brings chilly winter weather, with average highs around 49°F and lows near 24°F — a 25°F daily swing. Over 55 years of records, the warmest December 11th was in 2025 (60°F average), while the coldest was 1985 (7°F) — a 53°F range across recorded history. Precipitation has occurred on 18% of recorded December 11th dates, with snow falling 15% of the time (heaviest snowfall: 6.7"). The last decade has been 8.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.8°F warmer on this date compared to 20-30 years ago.
Planning for December 11th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 64° | 55° | 60° | — | — |
| 2024 | 54° | 32° | 43° | — | — |
| 2023 | 46° | 32° | 39° | — | — |
| 2022 | 59° | 27° | 43° | — | — |
| 2021 | 50° | 21° | 36° | — | — |
| 2020 | 28° | 21° | 25° | 0.05" | — |
| 2019 | 54° | 23° | 39° | — | — |
| 2018 | 55° | 30° | 43° | — | — |
| 2017 | 60° | 33° | 47° | — | — |
| 2016 | 51° | 26° | 39° | 0.18" | 0.1" |
| 2015 | 56° | 40° | 48° | — | — |
| 2014 | 63° | 29° | 46° | — | — |
| 2013 | 38° | 9° | 23° | — | — |
| 2012 | 43° | 11° | 27° | 0.13" | 1.1" |
| 2011 | 48° | 17° | 33° | — | — |
| 2010 | 45° | 23° | 34° | 0.03" | — |
| 2009 | 46° | 5° | 26° | — | — |
| 2008 | 51° | 33° | 42° | — | — |
| 2007 | 30° | 20° | 25° | 0.89" | 6.7" |
| 2006 | 48° | 32° | 40° | — | — |
| 2005 | 49° | 21° | 35° | — | — |
| 2004 | 62° | 42° | 52° | — | — |
| 2003 | 36° | 13° | 24° | — | — |
| 2002 | 51° | 28° | 40° | — | — |
| 2001 | 47° | 19° | 33° | — | — |
| 2000 | 19° | 3° | 11° | 0.61" | 4" |
| 1999 | 43° | 20° | 31° | — | — |
| 1998 | 47° | 15° | 31° | — | — |
| 1997 | 37° | 11° | 24° | 0.03" | 0.1" |
| 1996 | 56° | 35° | 45° | — | — |
| 1995 | 64° | 41° | 53° | — | — |
| 1994 | 46° | 18° | 32° | — | — |
| 1993 | 62° | 30° | 46° | — | — |
| 1992 | 61° | 26° | 43° | — | — |
| 1991 | 41° | 23° | 32° | — | — |
| 1990 | 67° | 42° | 54° | — | — |
| 1989 | 29° | 2° | 15° | 0.2" | 1.5" |
| 1988 | 43° | 24° | 33° | — | — |
| 1987 | 54° | 29° | 41° | — | — |
| 1986 | 42° | 16° | 29° | — | — |
| 1985coldest | 14° | -1° | 7° | 0.08" | 1" |
| 1984 | 58° | 45° | 51° | — | — |
| 1983 | 46° | 32° | 39° | — | — |
| 1982 | 35° | 24° | 30° | — | — |
| 1981 | 62° | 36° | 49° | — | — |
| 1980 | 67° | 42° | 54° | — | — |
| 1979 | 56° | 12° | 34° | 0.25" | 2" |
| 1978 | 49° | 0° | 24° | — | — |
| 1977 | 66° | 35° | 51° | — | — |
| 1976 | 50° | 16° | 33° | — | — |
| 1975 | 58° | 35° | 46° | — | — |
| 1974 | 44° | 21° | 33° | — | — |
| 1973 | 65° | 38° | 51° | — | — |
| 1972 | 35° | -9° | 13° | — | — |
| 1971 | 40° | 20° | 30° | — | — |
55 years of data from BOULDER MUNI AP