Weather on August 20
Madison, WI
55 Years of Data
Avg High
80°F
Avg Low
57°F
Warmest
1983
83°F avg
Coldest
1977
55°F avg
About This Date
August 20th in Madison, WI typically brings warm summer weather, with average highs around 80°F and lows near 57°F. Over 55 years of records, the warmest August 20th was in 1983 (83°F average), while the coldest was 1977 (55°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 33% of August 20th dates historically, with the wettest August 20th recording 3" of rain. The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Madison, WI? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 65° | 73° | — | — |
| 2024 | 78° | 54° | 66° | — | — |
| 2023 | 85° | 69° | 77° | — | — |
| 2022 | 77° | 62° | 70° | 0.53" | — |
| 2021 | 89° | 63° | 76° | — | — |
| 2020 | 86° | 59° | 73° | — | — |
| 2019 | 81° | 58° | 69° | — | — |
| 2018 | 83° | 68° | 75° | — | — |
| 2017 | 82° | — | — | — | — |
| 2016 | 81° | 64° | 72° | 2.79" | — |
| 2015 | 64° | 57° | 61° | 0.08" | — |
| 2014 | 82° | 59° | 71° | — | — |
| 2013 | 81° | 60° | 70° | — | — |
| 2012 | 76° | 48° | 62° | 0.41" | — |
| 2011 | 88° | 59° | 73° | 2.21" | — |
| 2010 | 85° | 67° | 76° | — | — |
| 2009 | 78° | 56° | 67° | 1.32" | — |
| 2008 | 81° | 61° | 71° | — | — |
| 2007 | 67° | 61° | 64° | 2.41" | — |
| 2006 | 80° | 54° | 67° | — | — |
| 2005 | 86° | 69° | 78° | 0.05" | — |
| 2004 | 68° | 46° | 57° | — | — |
| 2003 | 88° | 66° | 77° | — | — |
| 2002 | 77° | 49° | 63° | — | — |
| 2001 | 77° | 51° | 64° | — | — |
| 2000 | 74° | 53° | 63° | — | — |
| 1999 | 75° | 52° | 63° | — | — |
| 1998 | 80° | 56° | 68° | — | — |
| 1997 | 67° | 50° | 58° | 0.3" | — |
| 1996 | 79° | 66° | 72° | 1.27" | — |
| 1995 | 90° | 58° | 74° | 1.04" | — |
| 1994 | 79° | 60° | 69° | 0.43" | — |
| 1993 | 87° | 62° | 75° | — | — |
| 1992 | 79° | 43° | 61° | — | — |
| 1991 | 69° | 45° | 57° | — | — |
| 1990 | 75° | 64° | 70° | 3" | — |
| 1989 | 82° | 60° | 71° | 1.98" | — |
| 1988 | 80° | 48° | 64° | — | — |
| 1987 | 77° | 48° | 63° | — | — |
| 1986 | 82° | 49° | 65° | — | — |
| 1985 | 71° | 53° | 62° | — | — |
| 1984 | 80° | 46° | 63° | — | — |
| 1983warmest | 99° | 68° | 83° | — | — |
| 1982 | 86° | 66° | 76° | — | — |
| 1981 | 80° | 46° | 63° | — | — |
| 1980 | 90° | 61° | 75° | — | — |
| 1979 | 75° | 60° | 68° | 2.92" | — |
| 1978 | 78° | 42° | 60° | — | — |
| 1977coldest | 66° | 44° | 55° | — | — |
| 1976 | 88° | 57° | 72° | — | — |
| 1975 | 75° | 54° | 64° | 0.25" | — |
| 1974 | 88° | 59° | 73° | — | — |
| 1973 | 81° | 62° | 71° | 0.13" | — |
| 1972 | 84° | 67° | 75° | 0.05" | — |
| 1971 | 87° | 63° | 75° | — | — |
55 years of data from UW ARBORETUM - MADISON