Weather on September 11
Greeley, CO
55 Years of Data
About This Date
September 11th in Greeley, CO typically brings warm fall weather, with average highs around 80°F and lows near 51°F — a 29°F daily swing. Over 55 years of records, the warmest September 11th was in 2021 (79°F average), while the coldest was 1989 (40°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 11th dates historically, with the wettest September 11th recording 1.04" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for September 11th in Greeley, CO? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 60° | 76° | — | — |
| 2024 | 90° | 56° | 73° | — | — |
| 2023 | 74° | 54° | 64° | 0.15" | — |
| 2022 | 78° | 44° | 61° | 0.03" | — |
| 2021warmest | 99° | 59° | 79° | — | — |
| 2020 | 65° | 39° | 52° | — | — |
| 2019 | 81° | 56° | 68° | — | — |
| 2018 | 96° | 52° | 74° | — | — |
| 2017 | 92° | 62° | 77° | — | — |
| 2016 | 93° | 45° | 69° | — | — |
| 2015 | 79° | 56° | 67° | — | — |
| 2014 | 71° | 43° | 57° | 0.2" | — |
| 2013 | 70° | 60° | 65° | 0.56" | — |
| 2012 | 91° | 62° | 77° | — | — |
| 2011 | 84° | 43° | 63° | — | — |
| 2010 | 85° | 43° | 64° | — | — |
| 2009 | 90° | 54° | 72° | — | — |
| 2008 | 79° | 47° | 63° | — | — |
| 2007 | 86° | 40° | 63° | — | — |
| 2006 | 71° | 52° | 61° | 0.08" | — |
| 2005 | 92° | 53° | 72° | — | — |
| 2004 | 91° | 53° | 72° | 0.05" | — |
| 2003 | 74° | 42° | 58° | — | — |
| 2002 | 80° | 48° | 64° | 0.1" | — |
| 2001 | 90° | 48° | 69° | — | — |
| 2000 | 80° | 53° | 67° | — | — |
| 1999 | 77° | 53° | 65° | 0.15" | — |
| 1998 | 94° | 61° | 77° | — | — |
| 1997 | 89° | 59° | 74° | — | — |
| 1996 | 75° | 56° | 65° | — | — |
| 1995 | 80° | 55° | 68° | — | — |
| 1994 | 91° | 55° | 73° | — | — |
| 1993 | 91° | 49° | 70° | — | — |
| 1992 | 92° | 44° | 68° | — | — |
| 1991 | 83° | 56° | 69° | 0.08" | — |
| 1990 | 89° | 48° | 69° | — | — |
| 1989coldest | 45° | 35° | 40° | 0.1" | — |
| 1988 | 76° | 48° | 62° | 0.08" | — |
| 1987 | 69° | 47° | 58° | — | — |
| 1986 | 77° | 44° | 61° | — | — |
| 1985 | 68° | 58° | 63° | 0.66" | — |
| 1984 | 70° | 53° | 61° | — | — |
| 1983 | 90° | 44° | 67° | — | — |
| 1982 | 61° | 46° | 53° | 0.25" | — |
| 1981 | 83° | 59° | 71° | — | — |
| 1980 | 85° | 50° | 67° | — | — |
| 1979 | 66° | 48° | 57° | 0.36" | — |
| 1978 | 74° | 55° | 64° | — | — |
| 1977 | 86° | 54° | 70° | — | — |
| 1976 | 88° | 49° | 68° | — | — |
| 1975 | 54° | 44° | 49° | 0.33" | — |
| 1974 | 61° | 50° | 55° | — | — |
| 1973 | 78° | 57° | 68° | 1.04" | — |
| 1972 | 72° | 51° | 61° | 0.48" | — |
| 1971 | 88° | 49° | 68° | — | — |