Weather on September 8
Longmont, CO
55 Years of Data
Avg High
83°F
Avg Low
49°F
Warmest
2002
75°F avg
Coldest
1986
51°F avg
About This Date
September 8th in Longmont, CO typically brings warm fall weather, with average highs around 83°F and lows near 49°F — a 34°F daily swing. Over 55 years of records, the warmest September 8th was in 2002 (75°F average), while the coldest was 1986 (51°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 8th dates historically, with the wettest September 8th recording 2.41" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for September 8th in Longmont, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 55° | 70° | — | — |
| 2024 | 86° | 52° | 69° | — | — |
| 2023 | 89° | 52° | 70° | — | — |
| 2022 | 95° | 56° | 75° | — | — |
| 2021 | 83° | 51° | 67° | — | — |
| 2020 | 88° | 35° | 61° | 0.76" | — |
| 2019 | 89° | 53° | 71° | — | — |
| 2018 | 78° | 52° | 65° | — | — |
| 2017 | 83° | 50° | 66° | — | — |
| 2016 | 91° | 48° | 70° | — | — |
| 2015 | 85° | 54° | 69° | — | — |
| 2014 | 83° | 57° | 70° | 0.03" | — |
| 2013 | 91° | 58° | 74° | — | — |
| 2012 | 80° | 46° | 63° | — | — |
| 2011 | 75° | 48° | 62° | — | — |
| 2010 | 82° | 50° | 66° | 0.43" | — |
| 2009 | 87° | 53° | 70° | — | — |
| 2008 | 70° | 41° | 55° | 0.61" | — |
| 2007 | 85° | 51° | 68° | — | — |
| 2006 | 64° | 51° | 58° | 0.15" | — |
| 2005 | 86° | 56° | 71° | — | — |
| 2004 | 85° | 49° | 67° | — | — |
| 2003 | 78° | 51° | 65° | — | — |
| 2002warmest | 95° | 55° | 75° | — | — |
| 2001 | 72° | 46° | 59° | 1.57" | — |
| 2000 | 83° | 44° | 63° | — | — |
| 1999 | 82° | 46° | 64° | — | — |
| 1998 | 85° | 51° | 68° | — | — |
| 1997 | 86° | 45° | 65° | 0.13" | — |
| 1996 | 79° | 45° | 62° | — | — |
| 1995 | 58° | 47° | 52° | — | — |
| 1994 | 88° | 47° | 67° | — | — |
| 1993 | 74° | 39° | 56° | 0.25" | — |
| 1992 | 74° | — | — | — | — |
| 1991 | 86° | 54° | 70° | 2.41" | — |
| 1990 | 86° | 43° | 64° | — | — |
| 1989 | 82° | 53° | 68° | 1.04" | — |
| 1988 | 96° | 49° | 72° | — | — |
| 1987 | 68° | 44° | 56° | — | — |
| 1986coldest | 58° | 44° | 51° | 1.19" | — |
| 1985 | 79° | 46° | 62° | — | — |
| 1984 | 75° | 42° | 59° | — | — |
| 1983 | 92° | 51° | 71° | — | — |
| 1982 | 84° | 51° | 68° | — | — |
| 1981 | 76° | 49° | 62° | — | — |
| 1980 | 90° | 55° | 72° | — | — |
| 1979 | 92° | 53° | 72° | — | — |
| 1978 | 92° | 54° | 73° | — | — |
| 1977 | 93° | 53° | 73° | — | — |
| 1976 | 79° | 46° | 62° | 0.91" | — |
| 1975 | 84° | 50° | 67° | — | — |
| 1974 | 88° | 45° | 66° | — | — |
| 1973 | 86° | 53° | 70° | — | — |
| 1972 | 71° | 47° | 59° | 0.18" | — |
| 1971 | 91° | 49° | 70° | 1.37" | — |
55 years of data from LONGMONT 2 ESE