Weather on August 18
Fort Collins, CO
55 Years of Data
Avg High
85°F
Avg Low
56°F
Warmest
2020
78°F avg
Coldest
1978
60°F avg
About This Date
August 18th 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 18th was in 2020 (78°F average), while the coldest was 1978 (60°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 18th dates historically, with the wettest August 18th recording 2.69" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Fort Collins, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 59° | 75° | — | — |
| 2024 | 92° | 62° | 77° | — | — |
| 2023 | 91° | 62° | 77° | — | — |
| 2022 | 90° | 53° | 71° | — | — |
| 2021 | 93° | 57° | 75° | — | — |
| 2020warmest | 98° | 58° | 78° | — | — |
| 2019 | 84° | 56° | 70° | — | — |
| 2018 | 80° | 56° | 68° | 0.25" | — |
| 2017 | 85° | 53° | 69° | — | — |
| 2016 | 90° | 56° | 73° | 0.03" | — |
| 2015 | 77° | 53° | 65° | 0.58" | — |
| 2014 | 91° | 56° | 73° | — | — |
| 2013 | 90° | 57° | 73° | — | — |
| 2012 | 82° | 59° | 71° | — | — |
| 2011 | 95° | 53° | 74° | — | — |
| 2010 | 97° | 54° | 75° | — | — |
| 2009 | 78° | 54° | 66° | 0.03" | — |
| 2008 | 76° | 50° | 63° | — | — |
| 2007 | 89° | 59° | 74° | 0.28" | — |
| 2006 | 81° | 63° | 72° | — | — |
| 2005 | 86° | 55° | 71° | — | — |
| 2004 | 75° | 56° | 65° | 2.69" | — |
| 2003 | 77° | 61° | 69° | 0.25" | — |
| 2002 | 82° | 48° | 65° | — | — |
| 2001 | 89° | 51° | 70° | — | — |
| 2000 | 76° | 58° | 67° | — | — |
| 1999 | 84° | 51° | 68° | — | — |
| 1998 | 90° | 60° | 75° | — | — |
| 1997 | 76° | 57° | 66° | 0.08" | — |
| 1996 | 86° | 57° | 72° | 0.2" | — |
| 1995 | 94° | 57° | 75° | — | — |
| 1994 | 87° | 57° | 72° | — | — |
| 1993 | 81° | 63° | 72° | — | — |
| 1992 | 77° | 50° | 64° | — | — |
| 1991 | 82° | 55° | 69° | — | — |
| 1990 | 81° | 54° | 67° | — | — |
| 1989 | 83° | 56° | 69° | — | — |
| 1988 | 81° | 54° | 67° | — | — |
| 1987 | 80° | 53° | 67° | — | — |
| 1986 | 98° | 56° | 77° | — | — |
| 1985 | 74° | 54° | 64° | 0.05" | — |
| 1984 | 80° | 60° | 70° | — | — |
| 1983 | 89° | 62° | 76° | 0.08" | — |
| 1982 | 89° | 61° | 75° | — | — |
| 1981 | 82° | 52° | 67° | — | — |
| 1980 | 89° | 50° | 70° | — | — |
| 1979 | 76° | 58° | 67° | 0.43" | — |
| 1978coldest | 68° | 51° | 60° | 0.1" | — |
| 1977 | 78° | 61° | 69° | 0.18" | — |
| 1976 | 84° | 56° | 70° | 0.3" | — |
| 1975 | 86° | 51° | 69° | — | — |
| 1974 | 90° | 50° | 70° | — | — |
| 1973 | 92° | 62° | 77° | — | — |
| 1972 | 87° | 56° | 71° | — | — |
| 1971 | 85° | 63° | 74° | — | — |
55 years of data from FT COLLINS