(WFRV)- While most of our record highs stood to see another day on Sunday, Green Bay warmed up to 94° on the afternoon of Sunday, June 22, 2025, tying the record set back in 1910. However, this was quite a vulnerable record, as Appleton’s record high was 99° set back in 1911 and Oshkosh’s was 98° set back in 1988.
Either way, it was quite a warm day in northeast Wisconsin, the second of three days with highs in the 90s. Heat index values reached the triple digits as well.
Late Sunday Evening, the National Weather Service in Green Bay released the warmest heat indices felt in northeast Wisconsin. On top of that, Storm Team 5 meteorologist Ryan Kudish tallied the warmest air temperatures observed for the day.
HIGHEST MAXIMUM TEMPERATURES
- Iron Mountain 97°F
- Waupaca 96°F
- Appleton 95°F
- Shawano 95°F
- Wautoma 95°F
- Clintonville 94°F
- Green Bay 94°F
- Oconto 94°F
- Oshkosh 93°F
- Menominee 92°F
- Sturgeon Bay 92°F
- Fond Du Lac 91°F
- Antigo 91°F
- Manitowoc 90°F
WARMEST HEAT INDEX VALUES SORTED BY COUNTY
Brown County
- Green Bay Leo Frigo Bridge 108°F
- De Pere 107°F
- Denmark 105°F
- Green Bay Airport 103°F
Calumet County
- Brillion 105°F
Door County
- Maplewood 105°F
- Sturgeon Bay Airport 103°F
- Egg Harbor 103°F
- Southern Door 102°F
- Carlsville 101°F
Kewaunee County
- Luxemburg 106°F
- Kewaunee 105°F
Langlade County
- Antigo 101°F
Manitowoc County
- Valders 105°F
- Manitowoc Airport 101°F
Marinette County
- Wausaukee 106°F
Oconto County
- Breed 105°F
- Oconto Airport 104°F
- Suring 103°F
Outagamie County
- Appleton Airport 105°F
- Black Creek 105°F
Shawano County
- Keshena 105°F
- Wittenberg 105°F
- Shawano Airport 102°F
Waupaca County
- Clintonville Airport 105°F
- Iola 105°F
- Waupaca Airport 104°F
Waushara County
- Wautoma Airport 103°F
Winnebago County
- Oshkosh Airport 102°F
