Weather on June 21
Fort Collins, CO
55 Years of Data
Avg High
84°F
Avg Low
55°F
Warmest
2017
81°F avg
Coldest
2004
60°F avg
About This Date
June 21st in Fort Collins, CO typically brings warm summer weather, with average highs around 84°F and lows near 55°F — a 29°F daily swing. Over 55 years of records, the warmest June 21st was in 2017 (81°F average), while the coldest was 2004 (60°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 25% of June 21st dates historically, with the wettest June 21st recording 0.69" of rain. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for June 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° | 65° | 80° | — | — |
| 2024 | 85° | 61° | 73° | — | — |
| 2023 | 82° | 54° | 68° | — | — |
| 2022 | 80° | 55° | 68° | — | — |
| 2021 | 73° | 53° | 63° | 0.03" | — |
| 2020 | 80° | 62° | 71° | 0.03" | — |
| 2019 | 70° | 52° | 61° | 0.48" | — |
| 2018 | 79° | 51° | 65° | 0.03" | — |
| 2017warmest | 100° | 63° | 81° | — | — |
| 2016 | 99° | 58° | 78° | — | — |
| 2015 | 93° | 58° | 75° | — | — |
| 2014 | 86° | 56° | 71° | — | — |
| 2013 | 93° | 59° | 76° | — | — |
| 2012 | 88° | 57° | 72° | — | — |
| 2011 | 80° | 55° | 68° | — | — |
| 2010 | 86° | 61° | 73° | — | — |
| 2009 | 83° | 54° | 68° | — | — |
| 2008 | 86° | 50° | 68° | 0.03" | — |
| 2007 | 92° | 56° | 74° | — | — |
| 2006 | 82° | 56° | 69° | — | — |
| 2005 | 90° | 58° | 74° | — | — |
| 2004coldest | 68° | 51° | 60° | 0.69" | — |
| 2003 | 85° | 51° | 68° | — | — |
| 2002 | 88° | 58° | 73° | — | — |
| 2001 | 78° | 53° | 66° | — | — |
| 2000 | 80° | 45° | 62° | — | — |
| 1999 | 85° | 54° | 69° | 0.33" | — |
| 1998 | 76° | 52° | 64° | — | — |
| 1997 | 85° | 61° | 73° | — | — |
| 1996 | 76° | 58° | 67° | 0.61" | — |
| 1995 | 85° | 57° | 71° | 0.03" | — |
| 1994 | 75° | 57° | 66° | 0.2" | — |
| 1993 | 84° | 53° | 69° | — | — |
| 1992 | 78° | 49° | 63° | 0.48" | — |
| 1991 | 78° | 55° | 67° | 0.23" | — |
| 1990 | 78° | 54° | 66° | — | — |
| 1989 | 85° | 53° | 69° | — | — |
| 1988 | 94° | 60° | 77° | 0.3" | — |
| 1987 | 87° | 52° | 69° | — | — |
| 1986 | 89° | 53° | 71° | — | — |
| 1985 | 81° | 60° | 70° | — | — |
| 1984 | 87° | 52° | 69° | — | — |
| 1983 | 90° | 55° | 72° | — | — |
| 1982 | 77° | 50° | 64° | — | — |
| 1981 | 89° | 58° | 73° | — | — |
| 1980 | 87° | 54° | 70° | 0.18" | — |
| 1979 | 85° | 50° | 67° | — | — |
| 1978 | 86° | 51° | 69° | — | — |
| 1977 | 83° | 54° | 68° | — | — |
| 1976 | 92° | 56° | 74° | — | — |
| 1975 | 71° | 50° | 61° | — | — |
| 1974 | 91° | 57° | 74° | — | — |
| 1973 | 80° | 47° | 63° | — | — |
| 1972 | 86° | 52° | 69° | — | — |
| 1971 | 91° | 57° | 74° | — | — |
55 years of data from FT COLLINS