Weather on May 15
Fort Collins, CO
55 Years of Data
About This Date
May 15th in Fort Collins, CO typically brings pleasant spring weather, with average highs around 72°F and lows near 45°F — a 27°F daily swing. Over 56 years of records, the warmest May 15th was in 1996 (70°F average), while the coldest was 2011 (42°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 15th dates historically, with the wettest May 15th recording 1.3" of rain. The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for May 15th in Fort Collins, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 82° | 49° | 65° | — | — |
| 2025 | 67° | 43° | 55° | — | — |
| 2024 | 68° | 47° | 57° | 0.23" | — |
| 2023 | 61° | 48° | 54° | 0.23" | — |
| 2022 | 76° | 49° | 62° | — | — |
| 2021 | 64° | 51° | 58° | 0.2" | — |
| 2020 | 64° | 50° | 57° | 0.2" | — |
| 2019 | 82° | 44° | 63° | — | — |
| 2018 | 75° | 41° | 58° | — | — |
| 2017 | 80° | 48° | 64° | — | — |
| 2016 | 54° | 40° | 47° | 0.13" | — |
| 2015 | 68° | 46° | 57° | 0.23" | — |
| 2014 | 68° | 44° | 56° | — | — |
| 2013 | 83° | 53° | 68° | 0.05" | — |
| 2012 | 80° | 46° | 63° | — | — |
| 2011coldest | 48° | 35° | 42° | 0.2" | — |
| 2010 | 57° | 44° | 51° | 0.36" | — |
| 2009 | 70° | 50° | 60° | — | — |
| 2008 | 61° | 41° | 51° | — | — |
| 2007 | 62° | 48° | 55° | 0.23" | — |
| 2006 | 75° | 39° | 57° | — | — |
| 2005 | 74° | 43° | 58° | — | — |
| 2004 | 68° | 41° | 55° | — | — |
| 2003 | 67° | 50° | 58° | 0.03" | — |
| 2002 | 73° | 45° | 59° | — | — |
| 2001 | 80° | 48° | 64° | 0.03" | — |
| 2000 | 82° | 42° | 62° | — | — |
| 1999 | 70° | 48° | 59° | — | — |
| 1998 | 71° | 48° | 60° | — | — |
| 1997 | 74° | 42° | 58° | 0.15" | — |
| 1996warmest | 86° | 53° | 70° | — | — |
| 1995 | 81° | 43° | 62° | — | — |
| 1994 | 77° | 44° | 61° | — | — |
| 1993 | 77° | 50° | 64° | 0.56" | — |
| 1992 | 82° | 44° | 63° | — | — |
| 1991 | 75° | 47° | 61° | 0.51" | — |
| 1990 | 67° | 44° | 55° | 0.13" | — |
| 1989 | 64° | 37° | 51° | — | — |
| 1988 | 76° | 48° | 62° | — | — |
| 1987 | 83° | 50° | 66° | — | — |
| 1986 | 62° | 47° | 54° | 0.1" | — |
| 1985 | 73° | 39° | 56° | — | — |
| 1984 | 84° | 52° | 68° | — | — |
| 1983 | 57° | 35° | 46° | 0.05" | — |
| 1982 | 64° | 39° | 52° | — | — |
| 1981 | 70° | 45° | 57° | — | — |
| 1980 | 54° | 46° | 50° | 1.3" | — |
| 1979 | 78° | 44° | 61° | — | — |
| 1978 | 88° | 49° | 68° | — | — |
| 1977 | 69° | 45° | 57° | 0.3" | — |
| 1976 | 75° | 42° | 59° | 0.1" | — |
| 1975 | 82° | 46° | 64° | — | — |
| 1974 | 73° | 43° | 58° | — | — |
| 1973 | 78° | 38° | 58° | — | — |
| 1972 | 82° | 40° | 61° | — | — |
| 1971 | 68° | 43° | 55° | — | — |
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.