Weather on March 18
Fort Collins, CO
55 Years of Data
About This Date
March 18th in Fort Collins, CO typically brings cool spring weather, with average highs around 56°F and lows near 29°F — a 27°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (64°F average), while the coldest was 1983 (24°F) — a 40°F range across recorded history. Precipitation has occurred on 32% of recorded March 18th dates, with snow falling 25% of the time (heaviest snowfall: 18"). The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Fort Collins, CO? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 85° | 43° | 64° | — | — |
| 2025 | 66° | 36° | 51° | — | — |
| 2024 | 62° | 28° | 45° | — | — |
| 2023 | 49° | 15° | 32° | — | — |
| 2022 | 56° | 20° | 38° | 0.05" | 0.5" |
| 2021 | 46° | 17° | 32° | — | — |
| 2020 | 65° | 27° | 46° | 0.08" | — |
| 2019 | 51° | 28° | 40° | — | — |
| 2018 | 57° | 32° | 45° | 0.71" | 0.1" |
| 2017 | 79° | 35° | 57° | — | — |
| 2016 | 32° | 22° | 27° | 1.19" | 6.6" |
| 2015 | 64° | 34° | 49° | — | — |
| 2014 | 46° | 34° | 40° | — | — |
| 2013 | 51° | 25° | 38° | — | — |
| 2012 | 71° | 34° | 52° | — | — |
| 2011 | 55° | 33° | 44° | 0.1" | — |
| 2010 | 65° | 32° | 48° | — | — |
| 2009 | 62° | 34° | 48° | — | — |
| 2008 | 51° | 25° | 38° | — | — |
| 2007 | 77° | 36° | 56° | — | — |
| 2006 | 49° | 23° | 36° | 0.15" | — |
| 2005 | 44° | 26° | 35° | — | — |
| 2004 | 67° | 35° | 51° | — | — |
| 2003 | 41° | 32° | 37° | 8.38" | 18" |
| 2002 | 44° | 26° | 35° | 0.03" | 0.3" |
| 2001 | 50° | 23° | 37° | 0.03" | 0.2" |
| 2000 | 46° | 34° | 40° | — | — |
| 1999 | 57° | 25° | 41° | — | — |
| 1998 | 44° | 29° | 36° | 4.65" | 8.8" |
| 1997 | 63° | 38° | 50° | — | — |
| 1996 | 43° | 29° | 36° | — | — |
| 1995 | 70° | 33° | 51° | — | — |
| 1994 | 68° | 31° | 49° | — | — |
| 1993 | 63° | 29° | 46° | — | — |
| 1992 | 52° | 32° | 42° | 0.71" | 0.7" |
| 1991 | 64° | 26° | 45° | — | — |
| 1990 | 43° | 30° | 36° | 0.15" | 1.4" |
| 1989 | 58° | 23° | 40° | — | — |
| 1988 | 50° | 12° | 31° | — | — |
| 1987 | 52° | 24° | 38° | — | — |
| 1986 | 42° | 33° | 38° | 0.05" | — |
| 1985 | 65° | 31° | 48° | — | — |
| 1984 | 53° | 30° | 42° | 0.36" | 1.1" |
| 1983coldest | 27° | 22° | 24° | 0.13" | 0.5" |
| 1982 | 51° | 36° | 43° | — | — |
| 1981 | 43° | 27° | 35° | 0.28" | 2.5" |
| 1980 | 61° | 23° | 42° | — | — |
| 1979 | 47° | 32° | 39° | 3.2" | 8.2" |
| 1978 | 73° | 36° | 54° | — | — |
| 1977 | 44° | 25° | 34° | — | 0.2" |
| 1976 | 69° | 42° | 56° | — | — |
| 1975 | 62° | 29° | 45° | — | — |
| 1974 | 62° | 30° | 46° | 0.28" | — |
| 1973 | 55° | 29° | 42° | — | — |
| 1972 | 72° | 30° | 51° | — | — |
| 1971 | 36° | 23° | 29° | — | — |