Weather on December 19
Longmont, CO
55 Years of Data
Avg High
45°F
Avg Low
15°F
Warmest
2004
45°F avg
Coldest
1983
3°F avg
About This Date
December 19th in Longmont, CO typically brings chilly winter weather, with average highs around 45°F and lows near 15°F — a 30°F daily swing. Over 55 years of records, the warmest December 19th was in 2004 (45°F average), while the coldest was 1983 (3°F) — a 42°F range across recorded history. Precipitation has occurred on 11% of recorded December 19th dates, with snow falling 5% of the time (heaviest snowfall: 7"). The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
Planning for December 19th in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 27° | 45° | — | — |
| 2024 | 59° | 23° | 41° | — | — |
| 2023 | 49° | 22° | 35° | — | — |
| 2022 | 42° | 11° | 26° | — | — |
| 2021 | 36° | 9° | 22° | — | — |
| 2020 | 41° | 15° | 28° | — | — |
| 2019 | 51° | 15° | 33° | — | — |
| 2018 | 58° | 27° | 42° | — | — |
| 2017 | 51° | 21° | 36° | — | — |
| 2016 | 48° | 5° | 27° | — | — |
| 2015 | 53° | 25° | 39° | — | — |
| 2014 | 50° | 21° | 36° | — | — |
| 2013 | 59° | 31° | 45° | — | — |
| 2012 | 38° | 11° | 24° | 0.41" | 3.7" |
| 2011 | 55° | 24° | 40° | 0.1" | 0.7" |
| 2010 | 55° | 21° | 38° | — | — |
| 2009 | 45° | 18° | 31° | — | — |
| 2008 | 47° | 21° | 34° | — | — |
| 2007 | 52° | 24° | 38° | — | — |
| 2006 | 39° | 19° | 29° | — | — |
| 2005 | 37° | 5° | 21° | — | — |
| 2004warmest | 63° | 27° | 45° | — | — |
| 2003 | 44° | 16° | 30° | — | — |
| 2002 | 42° | 21° | 32° | — | — |
| 2001 | 44° | 9° | 26° | — | — |
| 2000 | 44° | 6° | 25° | — | — |
| 1999 | 56° | 22° | 39° | — | — |
| 1998 | 40° | -1° | 20° | 0.1" | — |
| 1997 | 48° | 18° | 33° | — | — |
| 1996 | 24° | -15° | 5° | — | — |
| 1995 | 38° | 10° | 24° | — | — |
| 1994 | 59° | 26° | 43° | — | — |
| 1993 | 42° | 13° | 27° | — | — |
| 1992 | 28° | -6° | 11° | 0.2" | — |
| 1991 | 32° | 15° | 24° | — | — |
| 1990 | 45° | 11° | 28° | — | — |
| 1989 | 14° | -9° | 3° | — | — |
| 1988 | 46° | 11° | 28° | — | — |
| 1987 | 40° | 12° | 26° | — | — |
| 1986 | 41° | 14° | 28° | — | — |
| 1985 | 42° | 16° | 29° | — | — |
| 1984 | 32° | 4° | 18° | — | — |
| 1983coldest | 10° | -5° | 3° | — | — |
| 1982 | 45° | 25° | 35° | — | — |
| 1981 | 38° | 11° | 24° | — | — |
| 1980 | 36° | 17° | 26° | 0.25" | — |
| 1979 | 63° | 20° | 41° | — | — |
| 1978 | 41° | 22° | 31° | — | — |
| 1977 | 55° | 19° | 37° | — | — |
| 1976 | 59° | 20° | 39° | — | — |
| 1975 | 47° | 5° | 26° | — | — |
| 1974 | 49° | 23° | 36° | — | — |
| 1973 | 34° | 2° | 18° | 1.4" | 7" |
| 1972 | 51° | 16° | 33° | — | — |
| 1971 | 49° | 22° | 35° | — | — |
55 years of data from LONGMONT 2 ESE