Weather on September 28
Longmont, CO
55 Years of Data
Avg High
75°F
Avg Low
41°F
Warmest
2011
71°F avg
Coldest
1985
33°F avg
About This Date
September 28th in Longmont, CO typically brings pleasant fall weather, with average highs around 75°F and lows near 41°F — a 34°F daily swing. Over 55 years of records, the warmest September 28th was in 2011 (71°F average), while the coldest was 1985 (33°F) — a 38°F range across recorded history. Precipitation has occurred on 24% of recorded September 28th dates, with snow falling 2% of the time (heaviest snowfall: 5"). The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for September 28th in Longmont, CO? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 50° | 64° | — | — |
| 2024 | 83° | 51° | 67° | — | — |
| 2023 | 85° | 46° | 65° | — | — |
| 2022 | 77° | 46° | 62° | — | — |
| 2021 | 88° | 50° | 69° | — | — |
| 2020 | 57° | 36° | 46° | — | — |
| 2019 | 72° | 45° | 58° | 0.64" | — |
| 2018 | 78° | 43° | 60° | — | — |
| 2017 | 63° | 41° | 52° | 0.99" | — |
| 2016 | 82° | 47° | 64° | — | — |
| 2015 | 81° | 55° | 68° | — | — |
| 2014 | 73° | 50° | 62° | 0.03" | — |
| 2013 | 67° | 33° | 50° | 0.25" | — |
| 2012 | 72° | 42° | 57° | — | — |
| 2011warmest | 89° | 54° | 71° | — | — |
| 2010 | 90° | 48° | 69° | — | — |
| 2009 | 74° | 36° | 55° | — | — |
| 2008 | 82° | 49° | 65° | — | — |
| 2007 | 77° | 43° | 60° | — | — |
| 2006 | 79° | 35° | 57° | — | — |
| 2005 | 64° | 46° | 55° | 0.18" | — |
| 2004 | 76° | 49° | 62° | 0.36" | — |
| 2003 | 79° | 38° | 58° | — | — |
| 2002 | 76° | 37° | 56° | 0.05" | — |
| 2001 | 91° | 43° | 67° | — | — |
| 2000 | 76° | 33° | 54° | — | — |
| 1999 | 55° | 27° | 41° | 1.12" | — |
| 1998 | 80° | 38° | 59° | — | — |
| 1997 | 85° | 44° | 64° | — | — |
| 1996 | 59° | 39° | 49° | — | — |
| 1995 | 83° | 41° | 62° | — | — |
| 1994 | 85° | 42° | 63° | — | — |
| 1993 | 85° | 35° | 60° | — | — |
| 1992 | 82° | 34° | 58° | — | — |
| 1991 | 80° | 40° | 60° | — | — |
| 1990 | 74° | 42° | 58° | — | — |
| 1989 | 84° | 45° | 64° | — | — |
| 1988 | 77° | 43° | 60° | — | — |
| 1987 | 63° | 39° | 51° | — | — |
| 1986 | 71° | 38° | 54° | — | — |
| 1985coldest | 43° | 23° | 33° | 1.4" | 5" |
| 1984 | 57° | 22° | 39° | 0.15" | — |
| 1983 | 88° | 45° | 66° | — | — |
| 1982 | 80° | 43° | 61° | — | — |
| 1981 | 83° | 46° | 64° | — | — |
| 1980 | 86° | 44° | 65° | — | — |
| 1979 | 78° | 44° | 61° | — | — |
| 1978 | 87° | 46° | 67° | — | — |
| 1977 | 85° | 46° | 65° | — | — |
| 1976 | 47° | 33° | 40° | 0.2" | — |
| 1975 | 68° | 34° | 51° | — | — |
| 1974 | 52° | 32° | 42° | 0.51" | — |
| 1973 | 57° | 32° | 45° | 0.08" | — |
| 1972 | 84° | 39° | 62° | — | — |
| 1971 | 74° | 42° | 58° | — | — |
55 years of data from LONGMONT 2 ESE