TonightClear, with a low around 80. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph. SundaySunny and hot, with a high near 96. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Sunday NightClear, with a low around 79. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. MondaySunny and hot, with a high near 97. Heat index values as high as 103. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Monday NightA 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. TuesdayA 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.Tuesday NightA 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.WednesdayShowers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 85.Wednesday NightA chance of showers and thunderstorms. Mostly cloudy, with a low around 72.ThursdayShowers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 91.Thursday NightA chance of showers and thunderstorms. Partly cloudy, with a low around 71.FridayA chance of showers and thunderstorms. Mostly sunny, with a high near 87.Friday NightA chance of showers and thunderstorms. Partly cloudy, with a low around 70.SaturdayA chance of showers and thunderstorms. Mostly sunny, with a high near 87. , Be prepared with the most accurate 10-day forecast for Chicago, IL with highs, lows, chance of precipitation from The Weather Channel and Weather.com, Chicago, IL Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days..