Get your Day weather forecast for Chicago, IL. Hi Low, RealFeel, precip, radar, everything you need to be ready for the day, commute, and weekend!.Find the most current and reliable day weather forecasts, storm alerts, reports and information for Chicago, IL, US with The Weather Network..Today’s and tonight’s weather forecast, weather conditions and Doppler radar from The Weather Channel and Weather.com. Show me the weather in Chicago, IL. as of am CST. .Be prepared with the most accurate day forecast for with highs, lows, chance of precipitation from The Weather Channel and Weather.com.