Weather on August 15
Fort Collins, CO
55 Years of Data
Avg High
84°F
Avg Low
56°F
Warmest
2015
78°F avg
Coldest
2008
57°F avg
About This Date
August 15th in Fort Collins, CO typically brings warm summer weather, with average highs around 84°F and lows near 56°F — a 28°F daily swing. Over 55 years of records, the warmest August 15th was in 2015 (78°F average), while the coldest was 2008 (57°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 15th dates historically, with the wettest August 15th recording 2.36" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Fort Collins, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 59° | 76° | — | — |
| 2024 | 85° | 52° | 68° | — | — |
| 2023 | 90° | 50° | 70° | — | — |
| 2022 | 83° | 65° | 74° | 0.56" | — |
| 2021 | 89° | 65° | 77° | — | — |
| 2020 | 88° | 54° | 71° | — | — |
| 2019 | 92° | 56° | 74° | — | — |
| 2018 | 89° | 55° | 72° | — | — |
| 2017 | 82° | 56° | 69° | 0.08" | — |
| 2016 | 91° | 54° | 72° | — | — |
| 2015warmest | 96° | 60° | 78° | — | — |
| 2014 | 90° | 58° | 74° | 0.08" | — |
| 2013 | 85° | 51° | 68° | — | — |
| 2012 | 95° | 58° | 76° | — | — |
| 2011 | 91° | 58° | 74° | — | — |
| 2010 | 82° | 56° | 69° | — | — |
| 2009 | 77° | 54° | 65° | 0.13" | — |
| 2008coldest | 62° | 51° | 57° | 2.36" | — |
| 2007 | 84° | 65° | 74° | 0.03" | — |
| 2006 | 86° | 56° | 71° | — | — |
| 2005 | 81° | 51° | 66° | — | — |
| 2004 | 85° | 55° | 70° | — | — |
| 2003 | 88° | 56° | 72° | — | — |
| 2002 | 83° | 56° | 69° | — | — |
| 2001 | 82° | 64° | 73° | — | — |
| 2000 | 89° | 65° | 77° | — | — |
| 1999 | 83° | 60° | 71° | — | — |
| 1998 | 83° | 55° | 69° | — | — |
| 1997 | 89° | 53° | 71° | — | — |
| 1996 | 81° | 55° | 68° | 0.43" | — |
| 1995 | 89° | 53° | 71° | — | — |
| 1994 | 84° | 54° | 69° | — | — |
| 1993 | 81° | 53° | 67° | 0.23" | — |
| 1992 | 91° | 51° | 71° | — | — |
| 1991 | 87° | 58° | 72° | 0.51" | — |
| 1990 | 76° | 52° | 64° | — | — |
| 1989 | 80° | 52° | 66° | — | — |
| 1988 | 94° | 58° | 76° | — | — |
| 1987 | 85° | 57° | 71° | 0.03" | — |
| 1986 | 89° | 49° | 69° | — | — |
| 1985 | 85° | 51° | 68° | — | — |
| 1984 | 83° | 58° | 70° | — | — |
| 1983 | 90° | 60° | 75° | — | — |
| 1982 | 88° | 60° | 74° | — | — |
| 1981 | 77° | 57° | 67° | — | — |
| 1980 | 76° | 61° | 68° | 0.38" | — |
| 1979 | 68° | 50° | 59° | 0.2" | — |
| 1978 | 76° | 53° | 64° | — | — |
| 1977 | 82° | 61° | 71° | 0.03" | — |
| 1976 | 78° | 60° | 69° | — | — |
| 1975 | 77° | 55° | 66° | 0.05" | — |
| 1974 | 77° | 56° | 66° | — | — |
| 1973 | 87° | 55° | 71° | — | — |
| 1972 | 88° | 64° | 76° | 0.05" | — |
| 1971 | 84° | 55° | 70° | — | — |
55 years of data from FT COLLINS