April 1-15 mean average temperature vs records... the differential on some of these is bonkers
Alpena, MI: 2nd coldest on record at 28.0˚ (#1 is 27.6˚ in 1923)
Chicago, IL: 4th coldest on record at 36.5˚ (#1 is 33.0˚ in 1881)
Des Moines, IA: 2nd coldest on record at 36.7˚ (#1 is 30.7˚ in 1881)
Dubuque, IA: coldest on record at 31.1˚ (#2 is 33.3˚ in 1975)
Duluth, MN: tied coldest on record at 24.2˚ (with 1950)
Flint, MI: 2nd coldest on record at 34.5˚ (#1 is 31.9˚ in 1975)
Grand Rapids, MI: 3rd coldest on record at 34.4˚ (#1 is 31.4˚ in 1975)
Green Bay, WI: coldest on record at 28.8˚ (#2 is 30.5˚ in 1923)
La Crosse, WI: coldest on record at 31.7˚ (#2 is 33.4˚ in 1881)
Madison, WI: 2nd coldest on record at 31.1˚ (#1 is 30.1˚ in 1881)
Marquette, MI: coldest on record at 21.8˚ (#2 is 24.3˚ in 1881)
Milwaukee, WI: 6th coldest on record at 34.4˚ (#1 is 30.7˚ in 1881)
Minneapolis, MN: coldest on record at 27.8˚ (#2 is 30.7˚ in 1920)
Moline, IL: 3rd coldest on record at 36.9˚ (#1 is 33.4˚ in 1881)
Peoria, IL: 5th coldest on record at 39.6˚ (#1 is 37.1˚ in 1926)
Rockford, IL: coldest on record at 34.2˚ (#2 is 34.7˚ in 1975)
South Bend, IN: 6th coldest on record at 37.0˚ (#1 is 35.7˚ in 1907)