Weather on August 21
Fort Collins, CO
55 Years of Data
Avg High
85°F
Avg Low
56°F
Warmest
2013
78°F avg
Coldest
1974
63°F avg
About This Date
August 21st in Fort Collins, CO typically brings warm summer weather, with average highs around 85°F and lows near 56°F — a 29°F daily swing. Over 55 years of records, the warmest August 21st was in 2013 (78°F average), while the coldest was 1974 (63°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 21st dates historically, with the wettest August 21st recording 0.64" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 21st in Fort Collins, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 58° | 76° | — | — |
| 2024 | 92° | 61° | 76° | — | — |
| 2023 | 96° | 57° | 77° | — | — |
| 2022 | 79° | 57° | 68° | — | — |
| 2021 | 82° | 54° | 68° | — | — |
| 2020 | 93° | 57° | 75° | — | — |
| 2019 | 81° | 65° | 73° | — | — |
| 2018 | 71° | 56° | 63° | — | — |
| 2017 | 88° | 54° | 71° | — | — |
| 2016 | 87° | 47° | 67° | — | — |
| 2015 | 94° | 50° | 72° | — | — |
| 2014 | 84° | 57° | 71° | 0.03" | — |
| 2013warmest | 90° | 66° | 78° | — | — |
| 2012 | 87° | 56° | 71° | — | — |
| 2011 | 91° | 58° | 74° | — | — |
| 2010 | 92° | 55° | 73° | — | — |
| 2009 | 82° | 48° | 65° | — | — |
| 2008 | 90° | 52° | 71° | — | — |
| 2007 | 94° | 56° | 75° | — | — |
| 2006 | 84° | 56° | 70° | — | — |
| 2005 | 86° | 58° | 72° | — | — |
| 2004 | 78° | 48° | 63° | — | — |
| 2003 | 89° | 59° | 74° | — | — |
| 2002 | 85° | 59° | 72° | 0.13" | — |
| 2001 | 84° | 59° | 72° | — | — |
| 2000 | 77° | 57° | 67° | — | — |
| 1999 | 85° | 56° | 70° | 0.05" | — |
| 1998 | 87° | 59° | 73° | — | — |
| 1997 | 89° | 58° | 73° | 0.03" | — |
| 1996 | 87° | 56° | 71° | 0.05" | — |
| 1995 | 88° | 60° | 74° | — | — |
| 1994 | 81° | 53° | 67° | 0.03" | — |
| 1993 | 81° | 58° | 69° | 0.46" | — |
| 1992 | 79° | 54° | 66° | — | — |
| 1991 | 88° | 52° | 70° | 0.15" | — |
| 1990 | 87° | 59° | 73° | — | — |
| 1989 | 85° | 51° | 68° | — | — |
| 1988 | 86° | 64° | 75° | — | — |
| 1987 | 88° | 64° | 76° | 0.08" | — |
| 1986 | 74° | 56° | 65° | 0.64" | — |
| 1985 | 89° | 60° | 75° | — | — |
| 1984 | 75° | 59° | 67° | — | — |
| 1983 | 88° | 58° | 73° | — | — |
| 1982 | 86° | 59° | 73° | 0.08" | — |
| 1981 | 89° | 51° | 70° | — | — |
| 1980 | 80° | 46° | 63° | — | — |
| 1979 | 76° | 55° | 65° | — | — |
| 1978 | 88° | 56° | 72° | — | — |
| 1977 | 78° | 59° | 69° | — | — |
| 1976 | 91° | 52° | 71° | — | — |
| 1975 | 85° | 60° | 72° | 0.05" | — |
| 1974coldest | 76° | 50° | 63° | — | — |
| 1973 | 90° | 57° | 73° | — | — |
| 1972 | 79° | 55° | 67° | 0.13" | — |
| 1971 | 92° | 55° | 73° | — | — |
55 years of data from FT COLLINS