Weather on August 21
Aurora, CO
55 Years of Data
Avg High
87°F
Avg Low
57°F
Warmest
2013
81°F avg
Coldest
2004
61°F avg
About This Date
August 21st in Aurora, CO typically brings warm summer weather, with average highs around 87°F and lows near 57°F — a 30°F daily swing. Over 55 years of records, the warmest August 21st was in 2013 (81°F average), while the coldest was 2004 (61°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 31% of August 21st dates historically, with the wettest August 21st recording 0.69" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Aurora, CO? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 62° | 78° | — | — |
| 2024 | 94° | 66° | 80° | — | — |
| 2023 | 95° | 64° | 80° | — | — |
| 2022 | 79° | 58° | 68° | — | — |
| 2021 | 83° | 58° | 70° | 0.03" | — |
| 2020 | 92° | 59° | 75° | 0.03" | — |
| 2019 | 98° | 63° | 80° | — | — |
| 2018 | 78° | 49° | 63° | — | — |
| 2017 | 92° | 62° | 77° | — | — |
| 2016 | 77° | 49° | 63° | — | — |
| 2015 | 86° | 54° | 70° | — | — |
| 2014 | 88° | 57° | 72° | 0.18" | — |
| 2013warmest | 97° | 65° | 81° | — | — |
| 2012 | 83° | 54° | 68° | 0.13" | — |
| 2011 | 88° | 55° | 71° | 0.03" | — |
| 2010 | 87° | 58° | 72° | — | — |
| 2009 | 81° | 49° | 65° | — | — |
| 2008 | 88° | 55° | 71° | — | — |
| 2007 | 94° | 62° | 78° | — | — |
| 2006 | 83° | 56° | 69° | — | — |
| 2005 | 84° | 54° | 69° | — | — |
| 2004coldest | 74° | 49° | 61° | 0.03" | — |
| 2003 | 95° | 60° | 78° | — | — |
| 2002 | 85° | 62° | 73° | — | — |
| 2001 | 91° | 58° | 74° | 0.05" | — |
| 2000 | 87° | 56° | 71° | — | — |
| 1999 | 84° | 58° | 71° | — | — |
| 1998 | 86° | 58° | 72° | — | — |
| 1997 | 89° | 56° | 72° | — | — |
| 1996 | 87° | 59° | 73° | — | — |
| 1995 | 92° | 64° | 78° | 0.28" | — |
| 1994 | 91° | 55° | 73° | — | — |
| 1993 | 85° | 57° | 71° | 0.03" | — |
| 1992 | 90° | 55° | 72° | — | — |
| 1991 | 89° | 57° | 73° | — | — |
| 1990 | 87° | 61° | 74° | — | — |
| 1989 | 86° | 51° | 69° | — | — |
| 1988 | 88° | 63° | 75° | 0.41" | — |
| 1987 | 91° | 62° | 77° | 0.69" | — |
| 1986 | 88° | 54° | 71° | — | — |
| 1985 | 92° | 59° | 75° | 0.05" | — |
| 1984 | 69° | 59° | 64° | 0.08" | — |
| 1983 | 87° | 61° | 74° | 0.53" | — |
| 1982 | 87° | 60° | 74° | — | — |
| 1981 | 94° | 60° | 77° | — | — |
| 1980 | 83° | 49° | 66° | — | — |
| 1979 | 78° | 52° | 65° | — | — |
| 1978 | 92° | 56° | 74° | — | — |
| 1977 | 85° | 58° | 71° | 0.05" | — |
| 1976 | 91° | 59° | 75° | — | — |
| 1975 | 83° | 57° | 70° | 0.69" | — |
| 1974 | 80° | 45° | 62° | — | — |
| 1973 | 90° | 62° | 76° | 0.13" | — |
| 1972 | 84° | 56° | 70° | — | — |
| 1971 | 94° | 58° | 76° | — | — |
55 years of data from DENVER-STAPLETON