CHICAGO — Mostly sunny Friday with highs in the mid to upper 70s. 

Mostly clear tonight with a low near 60 degrees. 

Saturday Forecast: Mostly sunny Saturday with highs in the mid-80s. 

Sunday Forecast: Mostly sunny, hot and humid Sunday with inland highs in the lower 90s that feel like 98-105.  Cooler at the lake with highs in the upper 80s.

Full forecast details and more at the WGN Weather Center blog