Towns with the hottest summers in Illinois

Ranked by the typical afternoon high in July, 1991–2020, from NOAA’s gridded climate normals for each town. Neighboring towns on the same 5 km grid square have the same numbers, so each square is listed once, under its largest town. 691 towns with 2,500+ residents.

NOAA U.S. Climate Normals, 1991–2020Share