Weather on August 21
Detroit, MI
55 Years of Data
Avg High
81°F
Avg Low
63°F
Warmest
1998
81°F avg
Coldest
1973
61°F avg
About This Date
August 21st in Detroit, MI typically brings warm summer weather, with average highs around 81°F and lows near 63°F. Over 55 years of records, the warmest August 21st was in 1998 (81°F average), while the coldest was 1973 (61°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 16% of August 21st dates historically, with the wettest August 21st recording 0.97" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Detroit, MI? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 64° | 70° | — | — |
| 2024 | 77° | 55° | 66° | — | — |
| 2023 | 83° | 65° | 74° | — | — |
| 2022 | 81° | 67° | 74° | 0.36" | — |
| 2021 | 87° | 70° | 78° | — | — |
| 2020 | 89° | 64° | 77° | — | — |
| 2019 | 88° | 68° | 78° | 0.13" | — |
| 2018 | 84° | 66° | 75° | 0.41" | — |
| 2017 | 87° | 67° | 77° | — | — |
| 2016 | 78° | 63° | 70° | 0.23" | — |
| 2015 | 79° | 59° | 69° | — | — |
| 2014 | 83° | 66° | 74° | — | — |
| 2013 | 88° | 63° | 75° | — | — |
| 2012 | 77° | 57° | 67° | 0.97" | — |
| 2011 | 79° | 64° | 71° | 0.28" | — |
| 2010 | 78° | 69° | 74° | 0.84" | — |
| 2009 | 79° | 67° | 73° | 0.05" | — |
| 2008 | 84° | 58° | 71° | — | — |
| 2007 | 75° | 60° | 68° | — | — |
| 2006 | 83° | 58° | 70° | — | — |
| 2005 | 85° | 67° | 76° | — | — |
| 2004 | 71° | 56° | 63° | — | — |
| 2003 | 92° | 69° | 80° | — | — |
| 2002 | 82° | 59° | 71° | — | — |
| 2001 | 81° | 59° | 70° | — | — |
| 2000 | 72° | 52° | 62° | — | — |
| 1999 | 81° | 60° | 70° | — | — |
| 1998warmest | 91° | 72° | 81° | — | — |
| 1997 | 70° | 59° | 64° | — | — |
| 1996 | 88° | 70° | 79° | — | — |
| 1995 | 89° | 69° | 79° | — | — |
| 1994 | 77° | 62° | 70° | — | — |
| 1993 | 76° | 60° | 68° | — | — |
| 1992 | 78° | 55° | 67° | — | — |
| 1991 | 79° | 58° | 68° | — | — |
| 1990 | 71° | 64° | 68° | — | — |
| 1989 | 83° | 67° | 75° | — | — |
| 1988 | 76° | 59° | 67° | — | — |
| 1987 | 77° | 67° | 72° | — | — |
| 1986 | 85° | 66° | 75° | — | — |
| 1985 | 69° | 58° | 63° | — | — |
| 1984 | 80° | 61° | 70° | — | — |
| 1983 | 86° | 65° | 75° | — | — |
| 1982 | 72° | 59° | 65° | — | — |
| 1981 | 80° | 60° | 70° | — | — |
| 1980 | 84° | 73° | 79° | — | — |
| 1979 | 77° | 59° | 68° | — | — |
| 1978 | 78° | 57° | 68° | — | — |
| 1977 | 71° | 64° | 68° | — | — |
| 1976 | 86° | 63° | 74° | — | — |
| 1975 | 76° | 64° | 70° | — | — |
| 1974 | 88° | 72° | 80° | — | — |
| 1973coldest | 69° | 53° | 61° | — | — |
| 1972 | 83° | 68° | 75° | — | — |
| 1971 | 90° | 71° | 80° | 0.3" | — |
55 years of data from DETROIT CITY AP