Weather on December 11
Longmont, CO
55 Years of Data
Avg High
47°F
Avg Low
17°F
Warmest
2004
52°F avg
Coldest
1972
-6°F avg
About This Date
December 11th in Longmont, CO typically brings chilly winter weather, with average highs around 47°F and lows near 17°F — a 30°F daily swing. Over 55 years of records, the warmest December 11th was in 2004 (52°F average), while the coldest was 1972 (-6°F) — a 58°F range across recorded history. Precipitation has occurred on 15% of recorded December 11th dates, with snow falling 13% of the time (heaviest snowfall: 6.7"). The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for December 11th in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 30° | 44° | — | — |
| 2024 | 39° | 18° | 28° | — | — |
| 2023 | 53° | 20° | 36° | — | — |
| 2022 | 52° | 21° | 36° | — | — |
| 2021 | 41° | 13° | 27° | — | — |
| 2020 | 43° | 26° | 34° | 0.23" | 0.6" |
| 2019 | 38° | 18° | 28° | — | — |
| 2018 | 50° | 13° | 31° | — | — |
| 2017 | 60° | 21° | 41° | — | — |
| 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° | — | — |
| 2004warmest | 62° | 42° | 52° | — | — |
| 2003 | 30° | 6° | 18° | — | — |
| 2002 | 60° | 17° | 39° | — | — |
| 2001 | 44° | 9° | 26° | — | — |
| 2000 | 22° | -6° | 8° | 0.48" | 2.6" |
| 1999 | 47° | 27° | 37° | — | — |
| 1998 | 34° | -3° | 16° | — | — |
| 1997 | 34° | 6° | 20° | — | — |
| 1996 | 66° | 27° | 46° | — | — |
| 1995 | 57° | 32° | 45° | — | — |
| 1994 | 37° | 12° | 25° | — | — |
| 1993 | 58° | — | — | — | — |
| 1992 | 41° | 19° | 30° | — | — |
| 1991 | 45° | 22° | 33° | — | — |
| 1990 | 68° | 25° | 46° | — | — |
| 1989 | 29° | 2° | 15° | 0.2" | 1.5" |
| 1988 | 42° | 7° | 24° | — | — |
| 1987 | 63° | 26° | 44° | — | — |
| 1986 | 27° | -9° | 9° | — | — |
| 1985 | 11° | -7° | 2° | — | — |
| 1984 | 58° | 20° | 39° | — | — |
| 1983 | 50° | 28° | 39° | — | — |
| 1982 | 33° | 23° | 28° | — | — |
| 1981 | 68° | 33° | 51° | — | — |
| 1980 | 57° | 19° | 38° | — | — |
| 1979 | 64° | 19° | 42° | 0.13" | 1.5" |
| 1978 | 49° | 0° | 24° | — | — |
| 1977 | 61° | 15° | 38° | — | — |
| 1976 | 39° | 14° | 27° | — | — |
| 1975 | 67° | 34° | 50° | — | — |
| 1974 | 47° | 13° | 30° | — | — |
| 1973 | 61° | 21° | 41° | — | — |
| 1972coldest | 7° | -18° | -6° | — | — |
| 1971 | 40° | 20° | 30° | — | — |
55 years of data from LONGMONT 2 ESE