Weather on June 21
Fort Collins, CO
55 Years of Data
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 56 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. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 91° | 57° | 74° | — | — |
| 2025 | 95° | 65° | 80° | — | — |
| 2024 | 85° | 61° | 73° | — | — |
| 2023 | 82° | 54° | 68° | — | — |
| 2022 | 80° | 55° | 68° | — | — |
| 2021 | 73° | 53° | 63° | 0.01" | — |
| 2020 | 80° | 62° | 71° | 0.01" | — |
| 2019 | 70° | 52° | 61° | 0.19" | — |
| 2018 | 79° | 51° | 65° | 0.01" | — |
| 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° | 0.01" | — |
| 2007 | 92° | 56° | 74° | — | — |
| 2006 | 82° | 56° | 69° | — | — |
| 2005 | 90° | 58° | 74° | — | — |
| 2004coldest | 68° | 51° | 60° | 0.27" | — |
| 2003 | 85° | 51° | 68° | — | — |
| 2002 | 88° | 58° | 73° | — | — |
| 2001 | 78° | 53° | 66° | — | — |
| 2000 | 80° | 45° | 62° | — | — |
| 1999 | 85° | 54° | 69° | 0.13" | — |
| 1998 | 76° | 52° | 64° | — | — |
| 1997 | 85° | 61° | 73° | — | — |
| 1996 | 76° | 58° | 67° | 0.24" | — |
| 1995 | 85° | 57° | 71° | 0.01" | — |
| 1994 | 75° | 57° | 66° | 0.08" | — |
| 1993 | 84° | 53° | 69° | — | — |
| 1992 | 78° | 49° | 63° | 0.19" | — |
| 1991 | 78° | 55° | 67° | 0.09" | — |
| 1990 | 78° | 54° | 66° | — | — |
| 1989 | 85° | 53° | 69° | — | — |
| 1988 | 94° | 60° | 77° | 0.12" | — |
| 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° | 0.07" | — |
| 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° | — | — |
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
Most pleasant months in Fort Collins, CO: May, June, September.
What to expect on June 21st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
June 21st outlook →