Weather on September 1
Fort Collins, CO
55 Years of Data
Avg High
83°F
Avg Low
53°F
Warmest
2011
77°F avg
Coldest
1972
51°F avg
About This Date
September 1st in Fort Collins, CO typically brings warm fall weather, with average highs around 83°F and lows near 53°F — a 30°F daily swing. Over 55 years of records, the warmest September 1st was in 2011 (77°F average), while the coldest was 1972 (51°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 1st dates historically, with the wettest September 1st recording 2.39" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Fort Collins, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 53° | 70° | — | — |
| 2024 | 87° | 52° | 69° | — | — |
| 2023 | 94° | 56° | 75° | — | — |
| 2022 | 93° | 52° | 72° | — | — |
| 2021 | 90° | 60° | 75° | 0.05" | — |
| 2020 | 80° | 48° | 64° | — | — |
| 2019 | 96° | 56° | 76° | — | — |
| 2018 | 86° | 54° | 70° | — | — |
| 2017 | 88° | 57° | 72° | — | — |
| 2016 | 82° | 58° | 70° | — | — |
| 2015 | 91° | 52° | 71° | — | — |
| 2014 | 79° | 50° | 64° | — | — |
| 2013 | 79° | 64° | 71° | — | — |
| 2012 | 91° | 56° | 73° | 0.08" | — |
| 2011warmest | 94° | 61° | 77° | — | — |
| 2010 | 84° | 50° | 67° | — | — |
| 2009 | 89° | 51° | 70° | — | — |
| 2008 | 83° | 58° | 70° | — | — |
| 2007 | 87° | 60° | 74° | — | — |
| 2006 | 74° | 51° | 62° | — | — |
| 2005 | 82° | 45° | 63° | — | — |
| 2004 | 84° | 48° | 66° | — | — |
| 2003 | 80° | 48° | 64° | — | — |
| 2002 | 88° | 55° | 71° | — | — |
| 2001 | 88° | 53° | 70° | 0.15" | — |
| 2000 | 80° | 55° | 68° | 0.08" | — |
| 1999 | 78° | 56° | 67° | 2.39" | — |
| 1998 | 79° | 56° | 67° | 1.12" | — |
| 1997 | 80° | 58° | 69° | 0.33" | — |
| 1996 | 87° | 49° | 68° | — | — |
| 1995 | 95° | 55° | 75° | — | — |
| 1994 | 70° | 52° | 61° | — | — |
| 1993 | 83° | 48° | 65° | — | — |
| 1992 | 76° | 49° | 62° | 0.03" | — |
| 1991 | 84° | 51° | 68° | — | — |
| 1990 | 83° | 57° | 70° | — | — |
| 1989 | 77° | 59° | 68° | — | — |
| 1988 | 80° | 64° | 72° | — | — |
| 1987 | 81° | 53° | 67° | — | — |
| 1986 | 73° | 51° | 62° | 0.03" | — |
| 1985 | 78° | 60° | 69° | — | — |
| 1984 | 76° | 59° | 67° | 0.1" | — |
| 1983 | 93° | 54° | 73° | — | — |
| 1982 | 86° | 61° | 73° | — | — |
| 1981 | 81° | 48° | 64° | 0.05" | — |
| 1980 | 75° | 45° | 60° | — | — |
| 1979 | 80° | 50° | 65° | — | — |
| 1978 | 89° | 52° | 70° | — | — |
| 1977 | 86° | 49° | 67° | — | — |
| 1976 | 77° | 46° | 62° | — | — |
| 1975 | 80° | 55° | 68° | — | — |
| 1974 | 68° | 49° | 58° | — | — |
| 1973 | 80° | 49° | 64° | — | — |
| 1972coldest | 58° | 45° | 51° | 0.64" | — |
| 1971 | 78° | 54° | 66° | — | — |
55 years of data from FT COLLINS