Weather on September 12
Fort Collins, CO
55 Years of Data
About This Date
September 12th in Fort Collins, CO typically brings pleasant fall weather, with average highs around 76°F and lows near 49°F — a 27°F daily swing. Over 56 years of records, the warmest September 12th was in 1998 (72°F average), while the coldest was 1989 (36°F) — a 36°F range across recorded history. Precipitation has occurred on 29% of recorded September 12th dates, with snow falling 4% of the time (heaviest snowfall: 3.7"). The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for September 12th in Fort Collins, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 74° | 54° | 64° | — | — |
| 2025 | 80° | 55° | 68° | — | — |
| 2024 | 89° | 50° | 70° | — | — |
| 2023 | 76° | 46° | 61° | — | — |
| 2022 | 90° | 43° | 66° | — | — |
| 2021 | 81° | 60° | 70° | — | — |
| 2020 | 83° | 39° | 61° | — | — |
| 2019 | 76° | 51° | 63° | — | — |
| 2018 | 92° | 50° | 71° | — | — |
| 2017 | 91° | 54° | 72° | — | — |
| 2016 | 77° | 56° | 66° | — | — |
| 2015 | 84° | 47° | 65° | — | — |
| 2014 | 46° | 35° | 41° | 0.06" | — |
| 2013 | 65° | 59° | 62° | 1.99" | — |
| 2012 | 63° | 50° | 56° | 0.61" | — |
| 2011 | 86° | 51° | 69° | — | — |
| 2010 | 82° | 45° | 63° | — | — |
| 2009 | 65° | 48° | 56° | 0.02" | — |
| 2008 | 61° | 50° | 55° | 0.78" | — |
| 2007 | 86° | 45° | 65° | — | — |
| 2006 | 77° | 44° | 61° | — | — |
| 2005 | 83° | 56° | 69° | — | — |
| 2004 | 82° | 49° | 65° | — | — |
| 2003 | 79° | 42° | 60° | — | — |
| 2002 | 72° | 55° | 63° | 0.22" | — |
| 2001 | 84° | 46° | 65° | — | — |
| 2000 | 83° | 46° | 64° | — | — |
| 1999 | 64° | 47° | 55° | — | — |
| 1998warmest | 84° | 60° | 72° | 0.02" | — |
| 1997 | 84° | 55° | 70° | — | — |
| 1996 | 67° | 55° | 61° | — | — |
| 1995 | 81° | 43° | 62° | — | — |
| 1994 | 87° | 53° | 70° | — | — |
| 1993 | 88° | 49° | 68° | — | — |
| 1992 | 85° | 55° | 70° | — | — |
| 1991 | 75° | 52° | 63° | 0.07" | — |
| 1990 | 88° | 47° | 67° | — | — |
| 1989coldest | 40° | 33° | 36° | 0.43" | 3.7" |
| 1988 | 51° | 41° | 46° | 0.22" | — |
| 1987 | 78° | 43° | 60° | — | — |
| 1986 | 77° | 48° | 63° | — | — |
| 1985 | 75° | 48° | 62° | — | — |
| 1984 | 87° | 54° | 70° | — | — |
| 1983 | 79° | 45° | 62° | — | — |
| 1982 | 61° | 43° | 52° | 0.4" | — |
| 1981 | 85° | 49° | 67° | — | — |
| 1980 | 76° | 53° | 64° | — | — |
| 1979 | 63° | 48° | 55° | 0.02" | — |
| 1978 | 70° | 47° | 58° | — | — |
| 1977 | 76° | 55° | 65° | 0.08" | — |
| 1976 | 78° | 52° | 65° | 0.21" | — |
| 1975 | 58° | 44° | 51° | — | — |
| 1974 | 47° | 32° | 39° | 0.8" | 0.5" |
| 1973 | 70° | 48° | 59° | 0.16" | — |
| 1972 | 82° | 53° | 68° | — | — |
| 1971 | 77° | 58° | 67° | — | — |
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 September 12th
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.
September 12th outlook →