Weather on October 17
Longmont, CO
55 Years of Data
Avg High
66°F
Avg Low
34°F
Warmest
1988
66°F avg
Coldest
1999
27°F avg
About This Date
October 17th in Longmont, CO typically brings mild fall weather, with average highs around 66°F and lows near 34°F — a 32°F daily swing. Over 55 years of records, the warmest October 17th was in 1988 (66°F average), while the coldest was 1999 (27°F) — a 39°F range across recorded history. Precipitation has occurred on 13% of recorded October 17th dates, with snow falling 4% of the time (heaviest snowfall: 3.7"). 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 October 17th in Longmont, CO? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 39° | 54° | — | — |
| 2024 | 75° | 38° | 56° | — | — |
| 2023 | 74° | 37° | 55° | — | — |
| 2022 | 59° | 33° | 46° | — | — |
| 2021 | 68° | 33° | 51° | — | — |
| 2020 | 66° | 28° | 47° | — | — |
| 2019 | 79° | 33° | 56° | — | — |
| 2018 | 58° | 28° | 43° | — | — |
| 2017 | 82° | 33° | 58° | — | — |
| 2016 | 78° | 39° | 59° | — | — |
| 2015 | 78° | 41° | 60° | — | — |
| 2014 | 62° | 37° | 50° | — | — |
| 2013 | 48° | 33° | 41° | — | — |
| 2012 | 71° | 39° | 55° | 0.03" | — |
| 2011 | 58° | 42° | 50° | — | — |
| 2010 | 77° | 37° | 57° | — | — |
| 2009 | 69° | 32° | 51° | — | — |
| 2008 | 70° | 38° | 54° | — | — |
| 2007 | 61° | 39° | 50° | — | — |
| 2006 | 59° | 31° | 45° | 1.5" | 3.7" |
| 2005 | 79° | 47° | 63° | — | — |
| 2004 | 65° | 34° | 49° | — | — |
| 2003 | 76° | 35° | 55° | — | — |
| 2002 | 61° | 26° | 43° | — | — |
| 2001 | 78° | 27° | 52° | — | — |
| 2000 | 69° | 28° | 49° | — | — |
| 1999coldest | 36° | 19° | 27° | 0.48" | — |
| 1998 | 53° | 31° | 42° | 0.64" | — |
| 1997 | 71° | 28° | 50° | — | — |
| 1996 | 65° | 31° | 48° | — | — |
| 1995 | 83° | 38° | 60° | — | — |
| 1994 | 59° | 39° | 49° | 0.28" | — |
| 1993 | 67° | 28° | 47° | 0.28" | — |
| 1992 | 51° | 21° | 36° | — | — |
| 1991 | 90° | 39° | 64° | — | — |
| 1990 | 81° | 34° | 57° | — | — |
| 1989 | 35° | 26° | 31° | 0.38" | 1" |
| 1988warmest | 80° | 52° | 66° | — | — |
| 1987 | 57° | 30° | 44° | — | — |
| 1986 | 74° | 31° | 52° | — | — |
| 1985 | 66° | 32° | 49° | — | — |
| 1984 | 42° | 18° | 30° | — | — |
| 1983 | 65° | 31° | 48° | — | — |
| 1982 | 73° | 34° | 53° | — | — |
| 1981 | 53° | 30° | 42° | — | — |
| 1980 | 44° | 29° | 36° | — | — |
| 1979 | 67° | 44° | 55° | — | — |
| 1978 | 70° | 34° | 52° | — | — |
| 1977 | 82° | 32° | 57° | — | — |
| 1976 | 56° | 29° | 42° | — | — |
| 1975 | 59° | 28° | 44° | — | — |
| 1974 | 73° | 39° | 56° | — | — |
| 1973 | 69° | 34° | 51° | — | — |
| 1972 | 74° | 41° | 57° | — | — |
| 1971 | 48° | 42° | 45° | — | — |
55 years of data from LONGMONT 2 ESE