CHICAGO (CBS) -- Shower chances increase this evening and stay with us through the overnight. A few rumbles of thunder will also be possible. Lows will be around 70 degrees.

The best chance for rain on Friday will be before 1 p.m. Showers likely in the morning, then decreasing rain chances through the afternoon. Cloudy skies for Friday with highs in the mid-70s.

Mostly sunny and nice for Saturday. Highs will be mid-70s, but low 70s along the lakeshore.

Sunday will be sunny and warmer with highs in the low to mid-80s.

Turning hotter next workweek with small chances for rain.

TONIGHT: Scattered showers and storms. Low 71°

FRIDAY: Showers likely in the morning, then a chance for isolated showers in the afternoon. High 75°

SATURDAY: Mostly sunny. High 76°