| Includes the counties: Cook Includes the cities: Chicago Tonight... Increasing cloudiness. Cold. Lows 13 to 17...Except in the lower 20s downtown. West winds 10 to 15 mph becoming light and variable. Saturday... Mostly cloudy. Not as cold. Highs in the upper 30s. Light and variable winds in the morning becoming south around 10 mph in the afternoon. Saturday Night... Partly cloudy. Lows in the mid 20s. South winds 10 to 15 mph. Sunday... Partly sunny. Warmer. Highs in the mid 40s. Southwest winds 10 to 20 mph. Sunday Night... Mostly cloudy with a 40 percent chance of light rain showers or light snow showers. Lows in the lower 30s. Southwest winds 10 to 15 mph. Monday... Mostly cloudy with a 20 percent chance of snow showers. Highs in the upper 30s. Monday Night... Partly cloudy. Lows in the upper 20s. Tuesday... Partly cloudy in the morning then clearing. Highs in the upper 30s. Tuesday Night... Mostly clear. Lows in the upper 20s. Highs in the lower 40s. Wednesday... Mostly clear. Lows in the upper 20s. Highs in the lower 40s. Thursday... Mostly clear. Lows in the upper 20s. Highs in the lower 40s. Friday... Mostly clear. Lows in the upper 20s. Highs in the lower 40s. | 
