Weather on January 20
Longmont, CO
55 Years of Data
Avg High
45°F
Avg Low
17°F
Warmest
2005
60°F avg
Coldest
1984
-1°F avg
About This Date
January 20th in Longmont, CO typically brings chilly winter weather, with average highs around 45°F and lows near 17°F — a 28°F daily swing. Over 56 years of records, the warmest January 20th was in 2005 (60°F average), while the coldest was 1984 (-1°F) — a 61°F range across recorded history. Precipitation has occurred on 18% of recorded January 20th dates, with snow falling 13% of the time (heaviest snowfall: 8"). The last decade has been 8.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 8.5°F cooler on this date compared to 20-30 years ago.
Planning for January 20th in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 34° | 15° | 24° | — | — |
| 2025 | 15° | -5° | 5° | 0.25" | 1.5" |
| 2024 | 36° | 12° | 24° | — | — |
| 2023 | 28° | 8° | 18° | — | — |
| 2022 | 26° | 19° | 23° | 0.08" | — |
| 2021 | 40° | 15° | 27° | — | — |
| 2020 | 48° | 15° | 32° | — | — |
| 2019 | 45° | 19° | 32° | — | — |
| 2018 | 71° | 27° | 49° | — | — |
| 2017 | 55° | 18° | 36° | — | — |
| 2016 | 51° | 24° | 38° | — | — |
| 2015 | 49° | 24° | 36° | — | — |
| 2014 | 51° | 31° | 41° | — | — |
| 2013 | 52° | 25° | 38° | — | — |
| 2012 | 58° | 42° | 50° | — | — |
| 2011 | 33° | 8° | 21° | 0.03" | 0.2" |
| 2010 | 39° | 24° | 32° | — | — |
| 2009 | 71° | 34° | 52° | — | — |
| 2008 | 40° | 16° | 28° | — | — |
| 2007 | 34° | 12° | 23° | — | — |
| 2006 | 43° | 15° | 29° | 0.15" | 0.8" |
| 2005warmest | 73° | 46° | 60° | — | — |
| 2004 | 42° | 20° | 31° | — | — |
| 2003 | 68° | 25° | 46° | — | — |
| 2002 | 35° | 22° | 28° | — | — |
| 2001 | 40° | 20° | 30° | — | — |
| 2000 | 59° | 14° | 37° | — | — |
| 1999 | 57° | 23° | 40° | — | — |
| 1998 | 49° | 14° | 31° | — | — |
| 1997 | 58° | 20° | 39° | — | — |
| 1996 | 47° | 0° | 23° | — | — |
| 1995 | 51° | 21° | 36° | — | — |
| 1994 | 67° | 18° | 42° | — | — |
| 1993 | 23° | 3° | 13° | 0.1" | 0.5" |
| 1992 | 44° | 10° | 27° | — | — |
| 1991 | 50° | 5° | 28° | 0.46" | 2.5" |
| 1990 | 29° | 12° | 20° | 0.66" | — |
| 1989 | 50° | 13° | 31° | — | — |
| 1988 | 27° | -10° | 9° | — | — |
| 1987 | 28° | -10° | 9° | 0.3" | — |
| 1986 | 67° | 29° | 48° | — | — |
| 1985 | 30° | 4° | 17° | 0.05" | 0.5" |
| 1984coldest | 15° | -18° | -1° | — | — |
| 1983 | 37° | 14° | 26° | — | — |
| 1982 | 47° | 20° | 33° | — | — |
| 1981 | 51° | 18° | 34° | — | — |
| 1980 | 25° | 13° | 19° | — | — |
| 1979 | 40° | 19° | 29° | — | — |
| 1978 | 16° | 8° | 12° | — | — |
| 1977 | 47° | 17° | 32° | — | — |
| 1976 | 38° | 12° | 25° | — | — |
| 1975 | 51° | 22° | 36° | — | — |
| 1974 | 57° | 27° | 42° | — | — |
| 1973 | 48° | 24° | 36° | 1.91" | 8" |
| 1972 | 58° | 32° | 45° | — | — |
| 1971 | 49° | 27° | 38° | — | — |
56 years of data from LONGMONT 2 ESE