Weather on August 21
Greeley, CO
55 Years of Data
Avg High
90°F
Avg Low
57°F
Warmest
2013
83°F avg
Coldest
1980
65°F avg
About This Date
August 21st in Greeley, CO typically brings hot summer weather, with average highs around 90°F and lows near 57°F — a 33°F daily swing. Over 55 years of records, the warmest August 21st was in 2013 (83°F average), while the coldest was 1980 (65°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 11% of August 21st dates historically, with the wettest August 21st recording 1.73" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 21st in Greeley, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 57° | 77° | — | — |
| 2024 | 97° | 61° | 79° | — | — |
| 2023 | 98° | 58° | 78° | — | — |
| 2022 | 91° | 59° | 75° | — | — |
| 2021 | 87° | 52° | 69° | — | — |
| 2020 | 96° | 62° | 79° | — | — |
| 2019 | 85° | 57° | 71° | — | — |
| 2018 | 75° | 56° | 65° | — | — |
| 2017 | 86° | 57° | 72° | — | — |
| 2016 | 90° | 47° | 68° | — | — |
| 2015 | 92° | 53° | 72° | — | — |
| 2014 | 92° | 54° | 73° | — | — |
| 2013warmest | 99° | 67° | 83° | — | — |
| 2012 | 90° | 52° | 71° | — | — |
| 2011 | 93° | 55° | 74° | 0.2" | — |
| 2010 | 99° | 56° | 77° | — | — |
| 2009 | 88° | 47° | 67° | — | — |
| 2008 | 91° | 56° | 73° | — | — |
| 2007 | 98° | 65° | 81° | — | — |
| 2006 | 94° | 56° | 75° | — | — |
| 2005 | 87° | 54° | 70° | — | — |
| 2004 | 90° | 50° | 70° | — | — |
| 2003 | 95° | 58° | 76° | — | — |
| 2002 | 94° | 61° | 77° | — | — |
| 2001 | 89° | 60° | 75° | — | — |
| 2000 | 79° | 56° | 67° | — | — |
| 1999 | 88° | 58° | 73° | — | — |
| 1998 | 91° | 58° | 74° | — | — |
| 1997 | 91° | 60° | 76° | 0.05" | — |
| 1996 | 92° | 59° | 75° | — | — |
| 1995 | 92° | 62° | 77° | 0.23" | — |
| 1994 | 92° | 54° | 73° | — | — |
| 1993 | 87° | 58° | 72° | — | — |
| 1992 | 87° | 57° | 72° | — | — |
| 1991 | 91° | 54° | 72° | — | — |
| 1990 | 89° | 57° | 73° | — | — |
| 1989 | 87° | 51° | 69° | — | — |
| 1988 | 84° | 65° | 74° | — | — |
| 1987 | 90° | 61° | 75° | 0.41" | — |
| 1986 | 83° | 57° | 70° | — | — |
| 1985 | 93° | 59° | 76° | — | — |
| 1984 | 77° | 59° | 68° | 1.73" | — |
| 1983 | 90° | 60° | 75° | — | — |
| 1982 | 88° | 58° | 73° | — | — |
| 1981 | 92° | 52° | 72° | — | — |
| 1980coldest | 85° | 46° | 65° | — | — |
| 1979 | 79° | 54° | 66° | — | — |
| 1978 | 91° | 55° | 73° | — | — |
| 1977 | 86° | 58° | 72° | 0.05" | — |
| 1976 | 94° | 52° | 73° | — | — |
| 1975 | 87° | 59° | 73° | — | — |
| 1974 | 86° | 49° | 67° | — | — |
| 1973 | 95° | 57° | 76° | — | — |
| 1972 | 83° | 58° | 70° | — | — |
| 1971 | 94° | 56° | 75° | — | — |
55 years of data from GREELEY UNC