| Month | Day and
Year | Temp (F) | Location,
County |
| January | 1, 1897 | 66 | Prairie du Chien,
Crawford |
| February | 22, 1930 | 68 | High Falls,
Marinette |
| March | 29, 1895 | 89 | Prairie du Chien,
Crawford |
| April | 19, 1985 | 99 | Portage, Columbia |
| May | 31, 1934 | 109 | Prairie du Chien,
Crawford |
| June | 1, 1934 | 106 | Racine, Racine |
| 27, 1933 | | Brodhead, Green |
| 27, 1933 | | Hancock, Waushara |
| July | 13, 1936 | 114 |
Wisconsin Dells, Columbia |
| August | 2, 1988 | 108 |
Madison UW Arboretum, Dane |
| 1, 1988 | | Milwaukee Mt. Mary College,
Milwaukee |
| September | 7, 1939 | 104 |
Prairie du Chien, Crawford |
| 10, 1908 | | Richland Center, Richland |
| October | 14, 1897 | 95 |
Gratiot, LaFayette | ]
| November | 1, 1904 | 84 |
Prairie du Chien, Crawford |
| December | 8, 1946 | 66 |
Kenosha, Kenosha |