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Public Information Statement
National Weather Service Chicago IL
823 AM CDT Sun Jun 22 2025

...MAXIMUM HEAT INDEX REPORTS FROM 6/21/2025...

Location                     Heat Idx. Time/Date

Beecher                      110 F     0420 PM 06/21
Romeoville - Lewis Airport   110 F     0545 PM 06/21
Gary Airport                 109 F     0354 PM 06/21
Long Grove                   109 F     0408 PM 06/21
Queen of all Saints School C 109 F     0504 PM 06/21
Union Hill                   108 F     0245 PM 06/21
2 WNW Sugar Grove            108 F     0352 PM 06/21
1 S Lincoln Park - Chicago   108 F     0358 PM 06/21
Clarendon Hills              108 F     0448 PM 06/21
Yorkville                    108 F     0530 PM 06/21
1 SSW Harvard                107 F     0313 PM 06/21
Peru Airport                 107 F     0355 PM 06/21
Antioch                      107 F     0405 PM 06/21
Morris Airport               107 F     0435 PM 06/21
Joliet Airport               107 F     0515 PM 06/21
Buffalo Grove 2 NNE          107 F     0543 PM 06/21
1 SSE Portage                106 F     0325 PM 06/21
Schaumburg Airport           106 F     0435 PM 06/21
Chicago OHare                106 F     0451 PM 06/21
Waukegan Airport             106 F     0451 PM 06/21
Wheeling - Chicago Exec. Arp 106 F     0552 PM 06/21
DeKalb Airport               105 F     0315 PM 06/21
West Chicago - DuPage Arpt.  105 F     0352 PM 06/21
Rockford Airport             105 F     0354 PM 06/21
Valparaiso                   104 F     0228 PM 06/21
WATSEKA                      104 F     0240 PM 06/21
Chicago Midway               104 F     0553 PM 06/21
Lansing Airport              103 F     1235 PM 06/21
Pontiac Airport              103 F     0315 PM 06/21
Frankfort                    103 F     0420 PM 06/21
Valparaiso Airport           102 F     0356 PM 06/21
Rochelle Airport             102 F     0415 PM 06/21
Deerfield                    102 F     0530 PM 06/21
Crystal Lake                 102 F     0638 PM 06/21
Rensselaer Airport           100 F     0335 PM 06/21
Oak Lawn                     100 F     0455 PM 06/21

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.

$$