Weather on October 31
Longmont, CO
55 Years of Data
Avg High
55°F
Avg Low
29°F
Warmest
2016
65°F avg
Coldest
1991
11°F avg
About This Date
October 31st in Longmont, CO typically brings cool fall weather, with average highs around 55°F and lows near 29°F — a 26°F daily swing. Over 55 years of records, the warmest October 31st was in 2016 (65°F average), while the coldest was 1991 (11°F) — a 54°F range across recorded history. Precipitation has occurred on 27% of recorded October 31st dates, with snow falling 4% of the time. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for October 31st 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 |
|---|---|---|---|---|---|
| 2025 | 55° | 29° | 42° | — | — |
| 2024 | 45° | 32° | 38° | 0.08" | — |
| 2023 | 42° | 11° | 26° | — | — |
| 2022 | 62° | 29° | 45° | — | — |
| 2021 | 72° | 35° | 53° | — | — |
| 2020 | 68° | 29° | 48° | — | — |
| 2019 | 24° | 4° | 14° | — | — |
| 2018 | 44° | 34° | 39° | 0.51" | — |
| 2017 | 35° | 26° | 31° | 0.05" | 0.3" |
| 2016warmest | 78° | 52° | 65° | — | — |
| 2015 | 67° | 34° | 50° | — | — |
| 2014 | 57° | 29° | 43° | — | — |
| 2013 | 55° | 29° | 42° | — | — |
| 2012 | 71° | 40° | 55° | — | — |
| 2011 | 73° | 35° | 54° | — | — |
| 2010 | 65° | 38° | 51° | — | — |
| 2009 | 61° | 38° | 49° | — | — |
| 2008 | 75° | 40° | 57° | — | — |
| 2007 | 64° | 33° | 49° | 0.15" | — |
| 2006 | 39° | 23° | 31° | — | — |
| 2005 | 57° | 28° | 43° | 0.1" | — |
| 2004 | 60° | 28° | 44° | — | — |
| 2003 | 29° | 23° | 26° | 0.25" | — |
| 2002 | 20° | 10° | 15° | 0.1" | 0.5" |
| 2001 | 70° | 32° | 51° | — | — |
| 2000 | 63° | 27° | 45° | — | — |
| 1999 | 66° | 35° | 51° | — | — |
| 1998 | 45° | 31° | 38° | 0.2" | — |
| 1997 | 67° | 41° | 54° | — | — |
| 1996 | 39° | 25° | 32° | — | — |
| 1995 | — | 29° | — | — | — |
| 1994 | 44° | 20° | 32° | — | — |
| 1993 | 38° | 15° | 26° | — | — |
| 1992 | 56° | 36° | 46° | 0.03" | — |
| 1991coldest | 19° | 3° | 11° | — | — |
| 1990 | 77° | 38° | 57° | — | — |
| 1989 | 52° | 23° | 37° | — | — |
| 1988 | 72° | 25° | 48° | — | — |
| 1987 | 63° | 44° | 53° | 1.17" | — |
| 1986 | 71° | 40° | 55° | 0.13" | — |
| 1985 | 60° | 38° | 49° | 0.28" | — |
| 1984 | 35° | 26° | 31° | — | — |
| 1983 | 73° | 37° | 55° | — | — |
| 1982 | 60° | 34° | 47° | — | — |
| 1981 | 49° | 28° | 38° | 0.08" | — |
| 1980 | 68° | 34° | 51° | — | — |
| 1979 | 38° | 19° | 28° | — | — |
| 1978 | 50° | 29° | 39° | — | — |
| 1977 | 64° | 32° | 48° | — | — |
| 1976 | 54° | 25° | 39° | — | — |
| 1975 | 76° | 36° | 56° | — | — |
| 1974 | 48° | 27° | 37° | 0.41" | — |
| 1973 | 56° | 37° | 46° | — | — |
| 1972 | 25° | 18° | 21° | 0.03" | — |
| 1971 | 45° | 21° | 33° | — | — |
55 years of data from LONGMONT 2 ESE