Local Forecast for Chicago, IL Currently 86.0°F HI: 86°F LO: 70°F Extended Forecast This Afternoon Sunny, with a high near 86. Southeast wind around 10 mph. Tonight Mostly clear, with a low around 70. South southeast wind between 5 and 10 mph. Sunday A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South southwest wind between 10 and 15 mph, with gusts as high as 20 mph. Sunday Night Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 60. Southwest wind 5 to 10 mph becoming north northwest. Chance of precipitation is 60%. Monday A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 66. North wind between 10 and 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. Monday Night A 20 percent chance of showers. Partly cloudy, with a low around 54. Tuesday Mostly sunny, with a high near 65. Tuesday Night Partly cloudy, with a low around 54. Wednesday Mostly sunny, with a high near 71. Wednesday Night Partly cloudy, with a low around 60. Thursday Mostly sunny, with a high near 81. Thursday Night Partly cloudy, with a low around 65. Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83.