Heat — Southern Cook County, Illinois

2025-07-23 · Southern Cook County, Illinois

Wider weather episode

On July 23rd, high temperatures reached the lower 90s with peak heat index values generally in the 105 degree range for most areas, though a few areas peaked around 110 degrees. On July 24th, high temperatures reached the upper 80s and lower 90s with peak heat index values generally in the 100 degree range for most areas, though a few areas peaked around 105 degrees.

Source: NOAA Storm Events Database, event_id 1281422. Narrative written by the NWS forecast office that issued the report.