Weather on September 24
Longmont, CO
55 Years of Data
Avg High
75°F
Avg Low
42°F
Warmest
2012
72°F avg
Coldest
2000
33°F avg
About This Date
September 24th in Longmont, CO typically brings pleasant fall weather, with average highs around 75°F and lows near 42°F — a 33°F daily swing. Over 55 years of records, the warmest September 24th was in 2012 (72°F average), while the coldest was 2000 (33°F) — a 39°F range across recorded history. Precipitation has occurred on 16% of recorded September 24th dates, with snow falling 2% of the time (heaviest snowfall: 4"). The last decade has been 5.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.0°F warmer on this date compared to 20-30 years ago.
Planning for September 24th in Longmont, CO? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 52° | 46° | 49° | 2.74" | — |
| 2024 | 81° | 43° | 62° | — | — |
| 2023 | 77° | 41° | 59° | — | — |
| 2022 | 80° | 44° | 62° | — | — |
| 2021 | 81° | 45° | 63° | — | — |
| 2020 | 86° | 47° | 66° | — | — |
| 2019 | 81° | 43° | 62° | — | — |
| 2018 | 87° | 49° | 68° | — | — |
| 2017 | 57° | 45° | 51° | 2.26" | — |
| 2016 | 69° | 38° | 53° | — | — |
| 2015 | 85° | 47° | 66° | — | — |
| 2014 | 83° | 50° | 66° | — | — |
| 2013 | 75° | 43° | 59° | — | — |
| 2012warmest | 78° | 66° | 72° | — | — |
| 2011 | 84° | 53° | 69° | — | — |
| 2010 | 81° | 45° | 63° | — | — |
| 2009 | 65° | 38° | 51° | — | — |
| 2008 | 77° | 43° | 60° | — | — |
| 2007 | 66° | 47° | 56° | 2.31" | — |
| 2006 | 65° | 32° | 48° | — | — |
| 2005 | 71° | 49° | 60° | — | — |
| 2004 | 73° | 39° | 56° | — | — |
| 2003 | 89° | 45° | 67° | — | — |
| 2002 | 73° | 33° | 53° | — | — |
| 2001 | 75° | 36° | 55° | — | — |
| 2000coldest | 41° | 25° | 33° | 0.86" | 4" |
| 1999 | 83° | 41° | 62° | — | — |
| 1998 | 77° | 43° | 60° | 0.1" | — |
| 1997 | 56° | 38° | 47° | 0.25" | — |
| 1996 | 62° | 41° | 52° | 0.25" | — |
| 1995 | 65° | 38° | 51° | — | — |
| 1994 | 78° | 37° | 58° | — | — |
| 1993 | 62° | 45° | 53° | — | — |
| 1992 | 91° | 46° | 69° | — | — |
| 1991 | 75° | 34° | 54° | — | — |
| 1990 | 76° | 41° | 58° | — | — |
| 1989 | 66° | 38° | 52° | — | — |
| 1988 | 77° | 32° | 55° | — | — |
| 1987 | 86° | 43° | 64° | — | — |
| 1986 | 73° | 48° | 61° | — | — |
| 1985 | 60° | 32° | 46° | 0.05" | — |
| 1984 | 78° | 34° | 56° | — | — |
| 1983 | 86° | 36° | 61° | — | — |
| 1982 | 76° | 47° | 61° | — | — |
| 1981 | 88° | 48° | 68° | 1.17" | — |
| 1980 | 77° | 43° | 60° | — | — |
| 1979 | 90° | 48° | 69° | — | — |
| 1978 | 86° | 45° | 65° | — | — |
| 1977 | 69° | 35° | 52° | — | — |
| 1976 | 77° | 46° | 62° | — | — |
| 1975 | 76° | 37° | 56° | — | — |
| 1974 | 82° | 42° | 62° | — | — |
| 1973 | 74° | 46° | 60° | — | — |
| 1972 | 81° | 41° | 61° | — | — |
| 1971 | 68° | 34° | 51° | — | — |
55 years of data from LONGMONT 2 ESE