Weather on September 20
Greeley, CO
55 Years of Data
Avg High
78°F
Avg Low
46°F
Warmest
2022
76°F avg
Coldest
1983
43°F avg
About This Date
September 20th in Greeley, CO typically brings pleasant fall weather, with average highs around 78°F and lows near 46°F — a 32°F daily swing. Over 55 years of records, the warmest September 20th was in 2022 (76°F average), while the coldest was 1983 (43°F) — a 33°F range across recorded history. Precipitation has occurred on 15% of recorded September 20th dates, with snow falling 2% of the time (heaviest snowfall: 3"). The last decade has been 10.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.6°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Greeley, CO? Great weather for outdoor activities.
Warming Trend
2.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 54° | 70° | — | — |
| 2024 | 83° | 49° | 66° | — | — |
| 2023 | 85° | 48° | 66° | — | — |
| 2022warmest | 96° | 55° | 76° | — | — |
| 2021 | 86° | 51° | 69° | — | — |
| 2020 | 90° | 56° | 73° | — | — |
| 2019 | 87° | 53° | 70° | — | — |
| 2018 | 85° | 58° | 71° | 0.36" | — |
| 2017 | 87° | 44° | 66° | — | — |
| 2016 | 90° | 54° | 72° | — | — |
| 2015 | 84° | 45° | 64° | — | — |
| 2014 | 90° | 56° | 73° | — | — |
| 2013 | 83° | 46° | 64° | 0.05" | — |
| 2012 | 83° | 42° | 62° | — | — |
| 2011 | 80° | 43° | 61° | — | — |
| 2010 | 97° | 50° | 73° | — | — |
| 2009 | 88° | 46° | 67° | — | — |
| 2008 | 82° | 48° | 65° | — | — |
| 2007 | 95° | 49° | 72° | — | — |
| 2006 | 78° | 39° | 59° | — | — |
| 2005 | 92° | 45° | 68° | — | — |
| 2004 | 84° | 52° | 68° | — | — |
| 2003 | 79° | 41° | 60° | — | — |
| 2002 | 84° | 39° | 62° | — | — |
| 2001 | 81° | 49° | 65° | — | — |
| 2000 | 62° | 45° | 53° | — | — |
| 1999 | 55° | 43° | 49° | 0.53" | — |
| 1998 | 78° | 50° | 64° | 0.76" | — |
| 1997 | 54° | 44° | 49° | — | — |
| 1996 | 65° | 46° | 55° | 0.03" | — |
| 1995 | 51° | 37° | 44° | 1.45" | 3" |
| 1994 | 79° | 49° | 64° | — | — |
| 1993 | 76° | 39° | 57° | — | — |
| 1992 | 84° | 49° | 66° | — | — |
| 1991 | 81° | 37° | 59° | — | — |
| 1990 | 72° | 47° | 59° | — | — |
| 1989 | 75° | 56° | 65° | 0.28" | — |
| 1988 | 82° | 37° | 60° | — | — |
| 1987 | 75° | 45° | 60° | — | — |
| 1986 | 76° | 47° | 61° | — | — |
| 1985 | 57° | 43° | 50° | — | — |
| 1984 | 82° | 51° | 67° | — | — |
| 1983coldest | 57° | 28° | 43° | — | — |
| 1982 | 71° | 47° | 59° | — | — |
| 1981 | 88° | 50° | 69° | — | — |
| 1980 | 76° | 49° | 62° | 1.17" | — |
| 1979 | 73° | 55° | 64° | — | — |
| 1978 | 57° | 37° | 47° | — | — |
| 1977 | 87° | 47° | 67° | — | — |
| 1976 | 67° | 50° | 58° | — | — |
| 1975 | 63° | 31° | 47° | — | — |
| 1974 | 67° | 40° | 53° | — | — |
| 1973 | 80° | 48° | 64° | — | — |
| 1972 | 74° | 53° | 63° | — | — |
| 1971 | 65° | 30° | 47° | — | — |
55 years of data from GREELEY UNC