Weather on September 1
Fort Collins, CO
55 Years of Data
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.
| 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° | — | — |
Fort Collins, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Fort Collins, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Fort Collins, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Fort Collins, CO
Fort Collins, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.