Weather on May 21
Fort Collins, CO
55 Years of Data
About This Date
May 21st in Fort Collins, CO typically brings pleasant spring weather, with average highs around 73°F and lows near 46°F — a 27°F daily swing. Over 56 years of records, the warmest May 21st was in 2005 (73°F average), while the coldest was 2019 (39°F) — a 34°F range across recorded history. Precipitation has occurred on 25% of recorded May 21st dates, with snow falling 2% of the time (heaviest snowfall: 2.7"). The last decade has been 6.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 6.5°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Fort Collins, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 66° | 40° | 53° | 0.05" | — |
| 2025 | 76° | 50° | 63° | — | — |
| 2024 | 62° | 43° | 52° | 0.69" | — |
| 2023 | 80° | 45° | 62° | — | — |
| 2022 | 53° | 33° | 43° | — | — |
| 2021 | 75° | 50° | 63° | — | — |
| 2020 | 75° | 46° | 61° | — | — |
| 2019coldest | 46° | 32° | 39° | 1.8" | 2.7" |
| 2018 | 76° | 40° | 58° | — | — |
| 2017 | 64° | 40° | 52° | 0.46" | — |
| 2016 | 79° | 52° | 65° | — | — |
| 2015 | 55° | 40° | 47° | 0.05" | — |
| 2014 | 72° | 55° | 63° | 0.79" | — |
| 2013 | 71° | 45° | 58° | — | — |
| 2012 | 85° | 43° | 64° | — | — |
| 2011 | 68° | 40° | 54° | — | — |
| 2010 | 74° | 45° | 59° | — | — |
| 2009 | 72° | 50° | 61° | — | — |
| 2008 | 87° | 55° | 71° | — | — |
| 2007 | 78° | 49° | 63° | 0.18" | — |
| 2006 | 89° | 51° | 70° | — | — |
| 2005warmest | 90° | 56° | 73° | — | — |
| 2004 | 81° | 55° | 68° | — | — |
| 2003 | 76° | 37° | 56° | — | — |
| 2002 | 85° | 46° | 65° | — | — |
| 2001 | 60° | 33° | 47° | — | — |
| 2000 | 79° | 42° | 60° | — | — |
| 1999 | 76° | 48° | 62° | — | — |
| 1998 | 77° | 58° | 67° | — | — |
| 1997 | 77° | 51° | 64° | 0.05" | — |
| 1996 | 74° | 42° | 58° | — | — |
| 1995 | 74° | 41° | 57° | 0.94" | — |
| 1994 | 75° | 48° | 62° | — | — |
| 1993 | 78° | 50° | 64° | — | — |
| 1992 | 78° | 56° | 67° | — | — |
| 1991 | 80° | 52° | 66° | — | — |
| 1990 | 77° | 41° | 59° | — | — |
| 1989 | 75° | 51° | 63° | — | — |
| 1988 | 63° | 42° | 52° | — | — |
| 1987 | 52° | 41° | 46° | 0.99" | — |
| 1986 | 84° | 46° | 65° | — | — |
| 1985 | 67° | 41° | 54° | — | — |
| 1984 | 77° | 55° | 66° | 1.47" | — |
| 1983 | 72° | 31° | 51° | — | — |
| 1982 | 73° | 40° | 56° | — | — |
| 1981 | 65° | 51° | 58° | — | — |
| 1980 | 78° | 48° | 63° | — | — |
| 1979 | 72° | 43° | 57° | 0.03" | — |
| 1978 | 68° | 50° | 59° | — | — |
| 1977 | 66° | 41° | 54° | — | — |
| 1976 | 65° | 52° | 58° | 0.05" | — |
| 1975 | 47° | 38° | 42° | 0.46" | — |
| 1974 | 69° | 39° | 54° | — | — |
| 1973 | 82° | 54° | 68° | — | — |
| 1972 | 81° | 48° | 64° | — | — |
| 1971 | 76° | 42° | 59° | — | — |
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.