Weather on January 17
Longmont, CO
55 Years of Data
Avg High
44°F
Avg Low
16°F
Warmest
2011
48°F avg
Coldest
1987
3°F avg
About This Date
January 17th in Longmont, CO typically brings chilly winter weather, with average highs around 44°F and lows near 16°F — a 28°F daily swing. Over 56 years of records, the warmest January 17th was in 2011 (48°F average), while the coldest was 1987 (3°F) — a 45°F range across recorded history. Precipitation has occurred on 7% of recorded January 17th dates, with snow falling 5% of the time (heaviest snowfall: 3"). The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for January 17th in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 38° | 15° | 26° | — | — |
| 2025 | 57° | 20° | 38° | — | — |
| 2024 | 38° | -9° | 14° | — | — |
| 2023 | 44° | 22° | 33° | — | — |
| 2022 | 50° | 20° | 35° | — | — |
| 2021 | 53° | 27° | 40° | — | — |
| 2020 | 35° | 16° | 25° | — | — |
| 2019 | 48° | 29° | 38° | — | — |
| 2018 | 32° | -6° | 13° | — | — |
| 2017 | 41° | 15° | 28° | — | — |
| 2016 | 40° | 16° | 28° | — | — |
| 2015 | 58° | 37° | 47° | — | — |
| 2014 | 56° | 21° | 38° | — | — |
| 2013 | 52° | 21° | 36° | — | — |
| 2012 | 32° | 6° | 19° | 0.1" | 0.9" |
| 2011warmest | 55° | 41° | 48° | 0.03" | — |
| 2010 | 56° | 36° | 46° | — | — |
| 2009 | 59° | 32° | 46° | — | — |
| 2008 | 26° | 2° | 14° | — | — |
| 2007 | 41° | 11° | 26° | — | — |
| 2006 | 49° | 24° | 36° | — | — |
| 2005 | 49° | 25° | 37° | — | — |
| 2004 | 48° | 22° | 35° | — | — |
| 2003 | 43° | 18° | 30° | — | — |
| 2002 | 31° | 3° | 17° | — | — |
| 2001 | 27° | -12° | 8° | 0.1" | 3" |
| 2000 | 42° | 23° | 33° | — | — |
| 1999 | 49° | 24° | 36° | — | — |
| 1998 | 47° | 19° | 33° | — | — |
| 1997 | 21° | -11° | 5° | — | — |
| 1996 | 58° | 28° | 43° | — | — |
| 1995 | 41° | 22° | 31° | — | — |
| 1994 | 43° | 15° | 29° | — | — |
| 1993 | 39° | 12° | 26° | — | — |
| 1992 | 55° | 21° | 38° | — | — |
| 1991 | 42° | 13° | 27° | — | — |
| 1990 | 50° | 12° | 31° | — | — |
| 1989 | 54° | 24° | 39° | — | — |
| 1988 | 50° | 1° | 26° | — | — |
| 1987coldest | 15° | -10° | 3° | — | — |
| 1986 | 57° | 29° | 43° | — | — |
| 1985 | 40° | 17° | 28° | — | — |
| 1984 | 25° | -13° | 6° | 0.18" | 3" |
| 1983 | 45° | 19° | 32° | — | — |
| 1982 | 53° | 2° | 27° | — | — |
| 1981 | 24° | 11° | 17° | — | — |
| 1980 | 39° | 20° | 29° | — | — |
| 1979 | 50° | 17° | 34° | — | — |
| 1978 | 15° | -4° | 6° | — | — |
| 1977 | 44° | 3° | 24° | — | — |
| 1976 | 52° | 25° | 38° | — | — |
| 1975 | 42° | 12° | 27° | — | — |
| 1974 | 55° | 25° | 40° | — | — |
| 1973 | 58° | 28° | 43° | — | — |
| 1972 | 57° | 18° | 37° | — | — |
| 1971 | 49° | 28° | 38° | — | — |
56 years of data from LONGMONT 2 ESE