Weather on October 21
Fort Collins, CO
55 Years of Data
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.
| 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° | — | — |
Fort Collins, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Fort Collins, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Fort Collins, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Fort Collins, CO
Fort Collins, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.