Weather on April 21
Madison, WI
55 Years of Data
Avg High
61°F
Avg Low
37°F
Warmest
1985
72°F avg
Coldest
1982
33°F avg
About This Date
April 21st in Madison, WI typically brings mild spring weather, with average highs around 61°F and lows near 37°F. Over 55 years of records, the warmest April 21st was in 1985 (72°F average), while the coldest was 1982 (33°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 47% of April 21st dates historically, with the wettest April 21st recording 3.84" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Madison, WI? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 57° | 44° | 51° | 0.51" | — |
| 2024 | 46° | 27° | 36° | — | — |
| 2023 | 72° | 37° | 54° | 0.2" | — |
| 2022 | 49° | 43° | 46° | 0.41" | — |
| 2021 | 43° | 25° | 34° | — | — |
| 2020 | 64° | 29° | 46° | 0.05" | — |
| 2019 | 67° | 42° | 54° | — | — |
| 2018 | 60° | 30° | 45° | — | — |
| 2017 | 57° | 37° | 47° | — | — |
| 2016 | 72° | 47° | 59° | 0.08" | — |
| 2015 | 50° | 37° | 44° | 0.15" | — |
| 2014 | 78° | 53° | 66° | — | — |
| 2013 | 46° | 28° | 37° | — | — |
| 2012 | 47° | 29° | 38° | — | — |
| 2011 | 41° | 26° | 34° | — | — |
| 2010 | 67° | 37° | 52° | — | — |
| 2009 | 53° | 34° | 43° | 0.79" | — |
| 2008 | 74° | 43° | 58° | — | — |
| 2007 | 70° | 36° | 53° | — | — |
| 2006 | 72° | 38° | 55° | — | — |
| 2005 | 61° | 37° | 49° | — | — |
| 2004 | 61° | 36° | 48° | 1.85" | — |
| 2003 | 69° | 40° | 54° | 0.05" | — |
| 2002 | 57° | 32° | 45° | 0.05" | — |
| 2001 | 75° | 51° | 63° | 0.76" | — |
| 2000 | 47° | 37° | 42° | 1.19" | — |
| 1999 | 52° | 34° | 43° | 0.89" | — |
| 1998 | 67° | 33° | 50° | 0.36" | — |
| 1997 | 57° | 36° | 46° | 0.69" | — |
| 1996 | 74° | 31° | 52° | — | — |
| 1995 | 46° | 32° | 39° | 0.94" | — |
| 1994 | 59° | 32° | 46° | — | — |
| 1993 | 49° | 21° | 35° | 0.84" | — |
| 1992 | 68° | 40° | 54° | 0.2" | — |
| 1991 | 57° | 34° | 45° | — | — |
| 1990 | 60° | 41° | 51° | — | — |
| 1989 | 67° | 42° | 54° | — | — |
| 1988 | 59° | 22° | 40° | — | — |
| 1987 | 86° | 54° | 70° | — | — |
| 1986 | 62° | 32° | 47° | — | — |
| 1985warmest | 84° | 61° | 72° | — | — |
| 1984 | 59° | 24° | 42° | — | — |
| 1983 | 63° | 23° | 43° | — | — |
| 1982coldest | 41° | 25° | 33° | — | — |
| 1981 | 47° | 21° | 34° | — | — |
| 1980 | 78° | 36° | 57° | — | — |
| 1979 | 66° | 47° | 56° | 0.18" | — |
| 1978 | 39° | 29° | 34° | 0.18" | — |
| 1977 | 75° | 56° | 65° | 2.24" | — |
| 1976 | 57° | 44° | 51° | 3.81" | — |
| 1975 | 48° | 21° | 35° | — | — |
| 1974 | 77° | 55° | 66° | 0.3" | — |
| 1973 | 72° | 60° | 66° | 3.84" | — |
| 1972 | 58° | 37° | 47° | 0.15" | — |
| 1971 | 73° | 38° | 55° | 0.64" | — |
55 years of data from UW ARBORETUM - MADISON