Tonight...Fair and mild. Lows in the lower 60s. Southeast winds 5 to 10 mph. Columbus Day...Partly cloudy. Continued unseasonably warm with highs in the lower 80s. South winds 10 to 20 mph. Monday Night...Mostly cloudy. A 40 percent chance of showers and isolated thunderstorms after midnight. Lows around 60. Southwest winds 10 to 15 mph becoming northwest toward morning. Tuesday...Mostly cloudy with a 40 percent chance of showers and isolated thunderstorms. Highs in the lower 70s. North winds 10 to 15 mph in the morning becoming light and variable. Tuesday Night...Mostly cloudy with a 40 percent chance of rain. Lows around 50. Light and variable winds in the evening becoming northwest around 10 mph after midnight. Wednesday...Mostly cloudy with a 30 percent chance of rain. Highs in the mid 60s. Wednesday Night...Clearing. Lows in the mid 40s. Thursday...Mostly sunny in the morning then becoming partly cloudy. Highs in the lower 60s. Thursday Night...Mostly cloudy with a slight chance of rain. Lows in the mid 40s. Chance of rain 20 percent. Friday...Partly cloudy. Highs in the upper 50s. Lows from the mid 30s in the suburbs to the mid 40s in downtown chicago. Saturday...Partly cloudy. Highs in the upper 50s. Lows from the mid 30s in the suburbs to the mid 40s in downtown chicago. Saturday Night...Mostly clear. Lows in the mid 40s. Highs in the lower 60s.