Weather on August 21
Milwaukee, WI
55 Years of Data
Avg High
81°F
Avg Low
63°F
Warmest
1983
82°F avg
Coldest
1997
62°F avg
About This Date
August 21st in Milwaukee, WI 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 1983 (82°F average), while the coldest was 1997 (62°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 21st dates historically, with the wettest August 21st recording 1.8" 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 Milwaukee, WI? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 62° | 70° | — | — |
| 2024 | 73° | 51° | 62° | — | — |
| 2023 | 90° | 65° | 77° | — | — |
| 2022 | 77° | 67° | 72° | — | — |
| 2021 | 89° | 73° | 81° | 1.47" | — |
| 2020 | 85° | 65° | 75° | — | — |
| 2019 | 85° | 68° | 76° | — | — |
| 2018 | 77° | 63° | 70° | 0.08" | — |
| 2017 | 84° | 68° | 76° | — | — |
| 2016 | 75° | 60° | 68° | — | — |
| 2015 | 83° | 55° | 69° | — | — |
| 2014 | 77° | 65° | 71° | 1.12" | — |
| 2013 | 89° | 69° | 79° | — | — |
| 2012 | 77° | 56° | 66° | — | — |
| 2011 | 80° | 62° | 71° | — | — |
| 2010 | 95° | 70° | 82° | 1.8" | — |
| 2009 | 78° | 60° | 69° | 0.38" | — |
| 2008 | 86° | 65° | 75° | — | — |
| 2007 | 68° | 64° | 66° | 0.66" | — |
| 2006 | 81° | 56° | 68° | — | — |
| 2005 | 86° | 62° | 74° | — | — |
| 2004 | 81° | 48° | 64° | — | — |
| 2003 | 94° | 70° | 82° | — | — |
| 2002 | 81° | 53° | 67° | — | — |
| 2001 | 83° | 59° | 71° | — | — |
| 2000 | 73° | 56° | 64° | — | — |
| 1999 | 75° | 59° | 67° | — | — |
| 1998 | 86° | 69° | 78° | 0.03" | — |
| 1997coldest | 68° | 56° | 62° | — | — |
| 1996 | 86° | 70° | 78° | — | — |
| 1995 | 88° | 62° | 75° | — | — |
| 1994 | 74° | 60° | 67° | — | — |
| 1993 | 75° | 61° | 68° | — | — |
| 1992 | 79° | 58° | 68° | — | — |
| 1991 | 83° | 58° | 70° | — | — |
| 1990 | 68° | 64° | 66° | 0.03" | — |
| 1989 | 78° | 59° | 69° | — | — |
| 1988 | 75° | 61° | 68° | — | — |
| 1987 | 84° | 70° | 77° | — | — |
| 1986 | 74° | 65° | 69° | — | — |
| 1985 | 70° | 59° | 64° | — | — |
| 1984 | 85° | 61° | 73° | 0.84" | — |
| 1983warmest | 94° | 70° | 82° | 0.56" | — |
| 1982 | 76° | 59° | 67° | — | — |
| 1981 | 82° | 61° | 71° | — | — |
| 1980 | 85° | 70° | 77° | 0.08" | — |
| 1979 | 76° | 64° | 70° | — | — |
| 1978 | 81° | 59° | 70° | — | — |
| 1977 | 71° | 60° | 66° | 0.38" | — |
| 1976 | 89° | 65° | 77° | — | — |
| 1975 | 90° | 71° | 80° | 0.1" | — |
| 1974 | 86° | 70° | 78° | — | — |
| 1973 | 74° | 57° | 65° | — | — |
| 1972 | 89° | 72° | 80° | — | — |
| 1971 | 81° | 69° | 75° | — | — |
55 years of data from W ALLIS