Weather on April 21
Fort Collins, CO
55 Years of Data
About This Date
April 21st in Fort Collins, CO typically brings mild spring weather, with average highs around 64°F and lows near 36°F — a 28°F daily swing. Over 55 years of records, the warmest April 21st was in 1989 (66°F average), while the coldest was 2021 (31°F) — a 35°F range across recorded history. Precipitation has occurred on 35% of recorded April 21st dates, with snow falling 4% of the time (heaviest snowfall: 1.7"). 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 April 21st in Fort Collins, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 84° | 40° | 62° | — | — |
| 2025 | 72° | 34° | 53° | — | — |
| 2024 | 61° | 26° | 43° | — | — |
| 2023 | 47° | 29° | 38° | — | — |
| 2022 | 80° | 40° | 60° | — | — |
| 2021coldest | 35° | 27° | 31° | 0.1" | — |
| 2020 | 71° | 35° | 53° | — | — |
| 2019 | 69° | 49° | 59° | 0.53" | — |
| 2018 | 45° | 33° | 39° | 1.07" | 0.5" |
| 2017 | 48° | 38° | 43° | 1.65" | — |
| 2016 | 69° | 35° | 52° | — | — |
| 2015 | 69° | 34° | 51° | — | — |
| 2014 | 68° | 41° | 55° | — | — |
| 2013 | 61° | 33° | 47° | — | — |
| 2012 | 73° | 43° | 58° | — | — |
| 2011 | 67° | 38° | 52° | 0.81" | — |
| 2010 | 60° | 45° | 52° | 0.48" | — |
| 2009 | 75° | 38° | 56° | — | — |
| 2008 | 64° | 34° | 49° | — | — |
| 2007 | 66° | 42° | 54° | — | — |
| 2006 | 74° | 35° | 54° | — | — |
| 2005 | 61° | 37° | 49° | 0.56" | — |
| 2004 | 54° | 34° | 44° | 0.89" | — |
| 2003 | 65° | 34° | 49° | — | — |
| 2002 | 57° | 27° | 42° | — | — |
| 2001 | 50° | 34° | 42° | 0.46" | — |
| 2000 | 74° | 37° | 55° | — | — |
| 1999 | 64° | 45° | 54° | 0.25" | — |
| 1998 | 62° | 31° | 46° | 0.03" | — |
| 1997 | 64° | 48° | 56° | — | — |
| 1996 | 53° | 35° | 44° | 0.03" | — |
| 1995 | 43° | 37° | 40° | 0.13" | — |
| 1994 | 75° | 43° | 59° | — | — |
| 1993 | 57° | 29° | 43° | — | — |
| 1992 | 69° | 30° | 50° | — | — |
| 1991 | 56° | 40° | 48° | 1.09" | — |
| 1990 | 74° | 41° | 57° | — | — |
| 1989warmest | 88° | 44° | 66° | — | — |
| 1988 | 68° | 41° | 55° | 1.02" | — |
| 1987 | 62° | 30° | 46° | — | — |
| 1986 | 64° | 42° | 53° | 0.18" | — |
| 1985 | 62° | 40° | 51° | — | — |
| 1984 | 42° | 32° | 37° | 0.48" | 1.7" |
| 1983 | 63° | 43° | 53° | 2.51" | — |
| 1982 | 57° | 19° | 38° | — | — |
| 1981 | 66° | 39° | 53° | — | — |
| 1980 | 84° | 40° | 62° | — | — |
| 1979 | 70° | 33° | 51° | — | — |
| 1978 | 65° | 33° | 49° | — | — |
| 1977 | 61° | 31° | 46° | — | — |
| 1976 | 68° | 37° | 53° | — | — |
| 1975 | 60° | 35° | 48° | — | — |
| 1974 | 56° | 36° | 46° | — | — |
| 1972 | 64° | 29° | 46° | — | — |
| 1971 | 57° | 34° | 45° | 0.61" | — |
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.