Click a location below for detailed forecast. Chicago, IL Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days. Today’s and tonight’s Chicago, Illinois, United States weather forecast, weather conditions and Doppler radar from The Weather Channel and Weather.com Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Chicago area. Be prepared with the most accurate 10-day forecast for Chicago, Illinois with highs, lows, chance of precipitation from The Weather Channel and Weather.com Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Chicago area. Hourly weather forecast in Chicago, IL. Check current conditions in Chicago, IL with radar, hourly, and more. Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More The NBC 5 Storm Team forecast brings you the latest Chicago and Midwest weather forecasts, including live radar and weather maps. Live weather reports from Chicago weather stations and weather warnings that include risk of thunder, high UV index and forecast gales. See the links below the 12-day Chicago weather forecast table for other cities and towns nearby along with weather conditions for local outdoor activities.