Weather on December 1
Longmont, CO
55 Years of Data
Avg High
46°F
Avg Low
18°F
Warmest
1995
56°F avg
Coldest
1985
0°F avg
About This Date
December 1st in Longmont, CO typically brings chilly winter weather, with average highs around 46°F and lows near 18°F — a 28°F daily swing. Over 55 years of records, the warmest December 1st was in 1995 (56°F average), while the coldest was 1985 (0°F) — a 56°F range across recorded history. Precipitation has occurred on 7% of recorded December 1st dates, with snow falling 4% of the time (heaviest snowfall: 7.6"). The last decade has been 3.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.4°F cooler on this date compared to 20-30 years ago.
Planning for December 1st in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 23° | 11° | 17° | — | — |
| 2024 | 53° | 22° | 37° | — | — |
| 2023 | 36° | 20° | 28° | — | — |
| 2022 | 26° | 5° | 16° | — | — |
| 2021 | 57° | 32° | 45° | — | — |
| 2020 | 63° | 14° | 38° | — | — |
| 2019 | 40° | 9° | 24° | — | — |
| 2018 | 37° | 23° | 30° | 0.13" | — |
| 2017 | 52° | 27° | 39° | — | — |
| 2016 | 42° | 17° | 30° | — | — |
| 2015 | 41° | 16° | 28° | — | — |
| 2014 | 37° | 18° | 27° | — | — |
| 2013 | 56° | 31° | 43° | — | — |
| 2012 | 65° | 38° | 51° | — | — |
| 2011 | 48° | 20° | 34° | 1.45" | 7.6" |
| 2010 | 59° | 28° | 44° | — | — |
| 2009 | 50° | 28° | 39° | — | — |
| 2008 | 57° | 21° | 39° | — | — |
| 2007 | 40° | 18° | 29° | — | — |
| 2006 | 39° | 16° | 27° | — | — |
| 2005 | 37° | 17° | 27° | — | — |
| 2004 | 37° | 15° | 26° | — | — |
| 2003 | 57° | 12° | 35° | — | — |
| 2002 | 49° | 23° | 36° | — | — |
| 2001 | 49° | 15° | 32° | — | — |
| 2000 | 54° | 13° | 33° | — | — |
| 1999 | 59° | 28° | 44° | — | — |
| 1998 | 69° | 24° | 47° | — | — |
| 1997 | 46° | 18° | 32° | — | — |
| 1996 | 37° | 15° | 26° | — | — |
| 1995warmest | 70° | 43° | 56° | — | — |
| 1994 | 66° | 25° | 45° | — | — |
| 1993 | 51° | 22° | 36° | — | — |
| 1992 | 54° | 12° | 33° | — | — |
| 1991 | 21° | 2° | 11° | — | — |
| 1990 | 61° | 27° | 44° | — | — |
| 1989 | 53° | 14° | 34° | — | — |
| 1988 | 49° | 13° | 31° | — | — |
| 1987 | 42° | 13° | 27° | — | — |
| 1986 | 36° | 22° | 29° | 0.13" | — |
| 1985coldest | 5° | -5° | 0° | — | — |
| 1984 | 50° | 15° | 33° | — | — |
| 1983 | 15° | -2° | 7° | — | — |
| 1982 | 53° | 26° | 40° | — | — |
| 1981 | 46° | 10° | 28° | — | — |
| 1980 | 66° | 25° | 45° | — | — |
| 1979 | 35° | 1° | 18° | — | — |
| 1978 | 54° | 23° | 38° | — | — |
| 1977 | 39° | 21° | 30° | — | — |
| 1976 | 51° | 17° | 34° | — | — |
| 1975 | 48° | 2° | 25° | — | — |
| 1974 | 35° | 10° | 23° | — | — |
| 1973 | 48° | 22° | 35° | — | — |
| 1972 | 50° | 21° | 36° | — | — |
| 1971 | 43° | 22° | 32° | 0.15" | 1" |
55 years of data from LONGMONT 2 ESE