Weather on August 31
Fort Collins, CO
55 Years of Data
Avg High
83°F
Avg Low
54°F
Warmest
2011
77°F avg
Coldest
1993
58°F avg
About This Date
August 31st in Fort Collins, CO typically brings warm summer weather, with average highs around 83°F and lows near 54°F — a 29°F daily swing. Over 55 years of records, the warmest August 31st was in 2011 (77°F average), while the coldest was 1993 (58°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 31st dates historically, with the wettest August 31st recording 1.8" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in Fort Collins, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 49° | 66° | 0.03" | — |
| 2024 | 91° | 49° | 70° | — | — |
| 2023 | 93° | 54° | 73° | — | — |
| 2022 | 92° | 59° | 75° | — | — |
| 2021 | 92° | 54° | 73° | — | — |
| 2020 | 82° | 48° | 65° | — | — |
| 2019 | 88° | 59° | 73° | — | — |
| 2018 | 87° | 56° | 71° | — | — |
| 2017 | 80° | 56° | 68° | — | — |
| 2016 | 78° | 55° | 67° | — | — |
| 2015 | 86° | 67° | 76° | — | — |
| 2014 | 76° | 57° | 66° | 0.1" | — |
| 2013 | 92° | 60° | 76° | — | — |
| 2012 | 94° | 60° | 77° | — | — |
| 2011warmest | 97° | 57° | 77° | — | — |
| 2010 | 79° | 57° | 68° | — | — |
| 2009 | 75° | 49° | 62° | — | — |
| 2008 | 87° | 54° | 70° | 0.08" | — |
| 2007 | 88° | 53° | 70° | — | — |
| 2006 | 84° | 55° | 70° | 0.51" | — |
| 2005 | 84° | 47° | 65° | — | — |
| 2004 | 85° | 51° | 68° | — | — |
| 2003 | 70° | 53° | 61° | 0.25" | — |
| 2002 | 89° | 57° | 73° | — | — |
| 2001 | 81° | 53° | 67° | — | — |
| 2000 | 72° | 53° | 62° | — | — |
| 1999 | 89° | 59° | 74° | 0.15" | — |
| 1998 | 82° | 64° | 73° | 0.05" | — |
| 1997 | 83° | 56° | 69° | — | — |
| 1996 | 83° | 50° | 66° | — | — |
| 1995 | 87° | 54° | 70° | — | — |
| 1994 | 68° | 57° | 63° | 0.13" | — |
| 1993coldest | 73° | 43° | 58° | — | — |
| 1992 | 74° | 47° | 60° | — | — |
| 1991 | 82° | 52° | 67° | — | — |
| 1990 | 86° | 58° | 72° | 0.69" | — |
| 1989 | 89° | 54° | 71° | — | — |
| 1988 | 91° | 51° | 71° | — | — |
| 1987 | 80° | 48° | 64° | — | — |
| 1986 | 79° | 54° | 66° | — | — |
| 1985 | 89° | 60° | 75° | 0.13" | — |
| 1984 | 90° | 53° | 71° | — | — |
| 1983 | 84° | 54° | 69° | — | — |
| 1982 | 87° | 56° | 71° | — | — |
| 1981 | 83° | 55° | 69° | 0.03" | — |
| 1980 | 72° | 47° | 59° | — | — |
| 1979 | 88° | 50° | 69° | — | — |
| 1978 | 85° | 50° | 67° | — | — |
| 1977 | 73° | 58° | 65° | — | — |
| 1976 | 77° | 55° | 66° | 0.58" | — |
| 1975 | 90° | 51° | 70° | — | — |
| 1974 | 78° | 48° | 63° | — | — |
| 1973 | 79° | 63° | 71° | — | — |
| 1972 | 72° | 57° | 64° | 1.8" | — |
| 1971 | 85° | 55° | 70° | — | — |
55 years of data from FT COLLINS