CHICAGO (CBS) – Sunday will be a warm and mostly sunny day. Highs will reach the upper 80s, and there will be a slight chance for thunderstorms late in the day.

Monday brings a high of 90 degrees and isolated storms.

The normal high is 83 degrees. We hit 88 degrees on Saturday.

Forecast: 

Sunday – Mostly sunny. Isolated late day storms possible. High 88

Sunday night – 50% chance of thunderstorms

Monday – Scattered showers and storms. High 90