Weather history and climate summary information is available for the following locations:
- LaCrosse
- Madison
- Milwaukee
Warmest May Days
The warmest May days in Wisconsin are:
| LaCrosse, Wisconsin | 1988 | 93.9°F |
| Madison, Wisconsin | 2012 | 93.9°F |
| LaCrosse, Wisconsin | 2006 | 93.9°F |
| Madison, Wisconsin | 1952 | 93.4°F |
| LaCrosse, Wisconsin | 1998 | 93.2°F |
Coldest May Days
The coldest May days in Wisconsin were:
| Madison, Wisconsin | 1978 | 18.9°F |
| Madison, Wisconsin | 1977 | 23.9°F |
| Madison, Wisconsin | 1981 | 23.9°F |
| Madison, Wisconsin | 1989 | 24.1°F |
| Milwaukee, Wisconsin | 1963 | 24.4°F |
Wettest May Days
The wettest single days in May occurred:
| Madison, Wisconsin | 2000 | 3.2 inches |
| LaCrosse, Wisconsin | 2000 | 3.1 inches |
| Milwaukee, Wisconsin | 1990 | 2.9 inches |
| LaCrosse, Wisconsin | 1960 | 2.7 inches |
| Madison, Wisconsin | 1960 | 2.6 inches |