Weather on September 2
Longmont, CO
55 Years of Data
Avg High
85°F
Avg Low
52°F
Warmest
1995
78°F avg
Coldest
1972
49°F avg
About This Date
September 2nd in Longmont, CO typically brings warm fall weather, with average highs around 85°F and lows near 52°F — a 33°F daily swing. Over 55 years of records, the warmest September 2nd was in 1995 (78°F average), while the coldest was 1972 (49°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 2nd dates historically, with the wettest September 2nd recording 1.02" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for September 2nd in Longmont, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 51° | 68° | — | — |
| 2024 | 89° | 54° | 71° | — | — |
| 2023 | 94° | 56° | 75° | — | — |
| 2022 | 92° | 57° | 74° | — | — |
| 2021 | 86° | 61° | 73° | — | — |
| 2020 | 81° | 49° | 65° | — | — |
| 2019 | 96° | 57° | 77° | — | — |
| 2018 | 82° | 53° | 68° | — | — |
| 2017 | 87° | 54° | 70° | — | — |
| 2016 | 85° | 58° | 71° | 0.08" | — |
| 2015 | 91° | 57° | 74° | — | — |
| 2014 | 84° | 46° | 65° | — | — |
| 2013 | 90° | 55° | 72° | — | — |
| 2012 | 90° | 64° | 77° | — | — |
| 2011 | 84° | 55° | 70° | 0.03" | — |
| 2010 | 83° | 52° | 67° | — | — |
| 2009 | 86° | 55° | 71° | — | — |
| 2008 | 79° | 47° | 63° | 0.03" | — |
| 2007 | 90° | 61° | 75° | — | — |
| 2006 | 58° | 45° | 51° | 1.02" | — |
| 2005 | 89° | 50° | 70° | — | — |
| 2004 | 86° | 50° | 68° | — | — |
| 2003 | 82° | 53° | 68° | — | — |
| 2002 | 92° | 50° | 71° | — | — |
| 2001 | 91° | 44° | 68° | — | — |
| 2000 | 84° | 52° | 68° | — | — |
| 1999 | 84° | 50° | 67° | 0.03" | — |
| 1998 | 82° | 44° | 63° | — | — |
| 1997 | 85° | 54° | 69° | 0.38" | — |
| 1996 | 93° | 46° | 70° | — | — |
| 1995warmest | 100° | 56° | 78° | — | — |
| 1994 | 73° | 52° | 62° | — | — |
| 1993 | 91° | 47° | 69° | — | — |
| 1992 | 81° | 51° | 66° | — | — |
| 1991 | 90° | 54° | 72° | — | — |
| 1990 | 85° | 52° | 68° | 0.25" | — |
| 1989 | 83° | 49° | 66° | — | — |
| 1988 | 81° | 59° | 70° | — | — |
| 1987 | 85° | 55° | 70° | — | — |
| 1986 | 84° | 47° | 65° | — | — |
| 1985 | 86° | 55° | 71° | 0.33" | — |
| 1984 | 80° | 44° | 62° | — | — |
| 1983 | 96° | 58° | 77° | — | — |
| 1982 | 92° | 51° | 71° | — | — |
| 1981 | 87° | 50° | 69° | — | — |
| 1980 | 80° | 44° | 62° | — | — |
| 1979 | 84° | 48° | 66° | — | — |
| 1978 | 93° | 54° | 73° | — | — |
| 1977 | 88° | 55° | 71° | — | — |
| 1976 | 80° | 43° | 61° | — | — |
| 1975 | — | 52° | — | — | — |
| 1974 | 60° | 40° | 50° | 0.84" | — |
| 1973 | 82° | 52° | 67° | — | — |
| 1972coldest | 53° | 44° | 49° | 0.81" | — |
| 1971 | 90° | 54° | 72° | — | — |
55 years of data from LONGMONT 2 ESE