Weather on May 18
Fort Collins, CO
55 Years of Data
Avg High
73°F
Avg Low
45°F
Warmest
1996
69°F avg
Coldest
2017
40°F avg
About This Date
May 18th in Fort Collins, CO typically brings pleasant spring weather, with average highs around 73°F and lows near 45°F — a 28°F daily swing. Over 55 years of records, the warmest May 18th was in 1996 (69°F average), while the coldest was 2017 (40°F) — a 29°F range across recorded history. Precipitation has occurred on 45% of recorded May 18th dates, with snow falling 2% of the time (heaviest snowfall: 5.8"). The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Fort Collins, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 49° | 57° | 0.2" | — |
| 2024 | 76° | 48° | 62° | — | — |
| 2023 | 69° | 51° | 60° | 0.58" | — |
| 2022 | 85° | 51° | 68° | — | — |
| 2021 | 67° | 45° | 56° | — | — |
| 2020 | 84° | 48° | 66° | — | — |
| 2019 | 63° | 38° | 50° | 0.03" | — |
| 2018 | 74° | 54° | 64° | 0.43" | — |
| 2017coldest | 47° | 33° | 40° | 7.04" | 5.8" |
| 2016 | 65° | 43° | 54° | 0.05" | — |
| 2015 | 55° | 44° | 50° | 0.1" | — |
| 2014 | 76° | 43° | 59° | — | — |
| 2013 | 77° | 51° | 64° | — | — |
| 2012 | 84° | 49° | 66° | — | — |
| 2011 | 53° | 44° | 49° | 1.63" | — |
| 2010 | 70° | 50° | 60° | 0.13" | — |
| 2009 | 88° | 46° | 67° | — | — |
| 2008 | 85° | 44° | 64° | — | — |
| 2007 | 82° | 42° | 62° | — | — |
| 2006 | 87° | 48° | 68° | — | — |
| 2005 | 77° | 41° | 59° | — | — |
| 2004 | 73° | 53° | 63° | 0.15" | — |
| 2003 | 77° | 55° | 66° | 0.05" | — |
| 2002 | 71° | 42° | 57° | — | — |
| 2001 | 73° | 43° | 58° | 0.18" | — |
| 2000 | 57° | 43° | 50° | 0.13" | — |
| 1999 | 76° | 39° | 57° | — | — |
| 1998 | 83° | 47° | 65° | — | — |
| 1997 | 76° | 46° | 61° | — | — |
| 1996warmest | 88° | 50° | 69° | — | — |
| 1995 | 64° | 35° | 50° | 0.3" | — |
| 1994 | 85° | 49° | 67° | — | — |
| 1993 | 72° | 42° | 57° | 0.03" | — |
| 1992 | 86° | 46° | 66° | — | — |
| 1991 | 65° | 52° | 58° | 0.03" | — |
| 1990 | 78° | 40° | 59° | — | — |
| 1989 | 78° | 47° | 62° | — | — |
| 1988 | 73° | 53° | 63° | 1.75" | — |
| 1987 | 74° | 46° | 60° | 0.33" | — |
| 1986 | 72° | 41° | 56° | — | — |
| 1985 | 68° | 45° | 56° | 0.05" | — |
| 1984 | 77° | 44° | 61° | — | — |
| 1983 | 64° | 35° | 50° | — | — |
| 1982 | 80° | 42° | 61° | 0.03" | — |
| 1981 | 46° | 41° | 44° | 0.43" | — |
| 1980 | 62° | 39° | 51° | 0.05" | — |
| 1979 | 74° | 48° | 61° | — | — |
| 1978 | 66° | 39° | 53° | 0.43" | — |
| 1977 | 77° | 44° | 61° | — | — |
| 1976 | 85° | 40° | 62° | — | — |
| 1975 | 75° | 47° | 61° | 0.13" | — |
| 1974 | 77° | 52° | 64° | — | — |
| 1973 | 84° | 50° | 67° | — | — |
| 1972 | 81° | 46° | 63° | — | — |
| 1971 | 56° | 37° | 46° | 0.03" | — |
55 years of data from FT COLLINS