Weather on October 21
Fort Collins, CO
55 Years of Data
Avg High
64°F
Avg Low
35°F
Warmest
2003
62°F avg
Coldest
1984
29°F avg
About This Date
October 21st in Fort Collins, CO typically brings mild fall weather, with average highs around 64°F and lows near 35°F — a 29°F daily swing. Over 55 years of records, the warmest October 21st was in 2003 (62°F average), while the coldest was 1984 (29°F) — a 33°F range across recorded history. Precipitation has occurred on 20% of recorded October 21st dates, with snow falling 2% of the time. The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Fort Collins, CO? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 29° | 49° | — | — |
| 2024 | 72° | 48° | 60° | — | — |
| 2023 | 77° | 38° | 57° | — | — |
| 2022 | 78° | 45° | 61° | — | — |
| 2021 | 65° | 30° | 47° | — | — |
| 2020 | 59° | 34° | 46° | — | — |
| 2019 | 55° | 35° | 45° | — | — |
| 2018 | 77° | 33° | 55° | — | — |
| 2017 | 65° | 40° | 52° | — | — |
| 2016 | 74° | 33° | 53° | — | — |
| 2015 | 61° | 46° | 53° | 1.83" | — |
| 2014 | 77° | 40° | 58° | — | — |
| 2013 | 60° | 26° | 43° | — | — |
| 2012 | 68° | 38° | 53° | — | — |
| 2011 | 72° | 36° | 54° | — | — |
| 2010 | 71° | 35° | 53° | — | — |
| 2009 | 46° | 38° | 42° | — | — |
| 2008 | 55° | 37° | 46° | 0.15" | — |
| 2007 | 48° | 34° | 41° | 0.18" | — |
| 2006 | 48° | 35° | 42° | 0.08" | — |
| 2005 | 56° | 47° | 51° | 0.25" | — |
| 2004 | 68° | 36° | 52° | — | — |
| 2003warmest | 85° | 40° | 62° | — | — |
| 2002 | 58° | 30° | 44° | — | — |
| 2001 | 57° | 35° | 46° | — | — |
| 2000 | 71° | 33° | 52° | — | — |
| 1999 | 72° | 30° | 51° | — | — |
| 1998 | 58° | 27° | 42° | — | — |
| 1997 | 52° | 41° | 46° | — | — |
| 1996 | 46° | 24° | 35° | — | — |
| 1995 | 71° | 35° | 53° | — | — |
| 1994 | 67° | 34° | 50° | — | — |
| 1993 | 60° | 28° | 44° | — | — |
| 1992 | 79° | 36° | 57° | — | — |
| 1991 | 72° | 33° | 52° | — | — |
| 1990 | 52° | 23° | 37° | — | — |
| 1989 | 72° | 35° | 53° | — | — |
| 1988 | 67° | 35° | 51° | — | — |
| 1987 | 73° | 24° | 49° | — | — |
| 1986 | 52° | 43° | 47° | 0.05" | — |
| 1985 | 68° | 33° | 51° | — | — |
| 1984coldest | 32° | 26° | 29° | 0.23" | 0.9" |
| 1983 | 67° | 30° | 48° | — | — |
| 1982 | 60° | 28° | 44° | — | — |
| 1981 | 56° | 30° | 43° | 0.03" | — |
| 1980 | 65° | 30° | 47° | — | — |
| 1979 | 45° | 38° | 41° | 0.58" | — |
| 1978 | 66° | 48° | 57° | 0.94" | — |
| 1977 | 63° | 47° | 55° | — | — |
| 1976 | 59° | 22° | 40° | — | — |
| 1975 | 77° | 34° | 55° | — | — |
| 1974 | 75° | 38° | 56° | — | — |
| 1973 | 73° | 41° | 57° | — | — |
| 1972 | 54° | 42° | 48° | 0.05" | — |
| 1971 | 61° | 33° | 47° | — | — |
55 years of data from FT COLLINS