Weather on September 20
Greeley, CO
55 Years of Data
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.
| 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° | — | — |
Greeley, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Greeley, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Greeley, 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 Greeley, CO
Greeley, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.