The Brief Rain is expected on and off throughout the day, with the greatest chance for showers and thunderstorms this evening. The heaviest rainfall could once again fall over the south and southwestern suburbs, where recent storms have already soaked the area. It won’t be raining all day today, but it could rain at almost any time. Tonight, there will be showers and thunderstorms in the area moving south with lows in the 60s. High temperatures won’t be as warm — likely staying in the upper 70s.