Illinois Weather Forecast
Pick a Illinois city for live conditions, the official 7-day forecast and any active watches or warnings from the National Weather Service.
Illinois cities
Chicago · pop. 2,731,5857-day forecast ›Aurora · pop. 181,5057-day forecast ›Naperville · pop. 153,1147-day forecast ›Joliet · pop. 152,2417-day forecast ›Rockford · pop. 147,3847-day forecast ›Elgin · pop. 115,4767-day forecast ›Springfield · pop. 112,9897-day forecast ›Peoria · pop. 110,9207-day forecast ›
Population: U.S. Census Bureau, Vintage 2025 estimates (July 1, 2025). Forecasts: National Weather Service.
All states and citiesQuestions & answers
Which Illinois cities are covered?
Chicago, Aurora, Naperville, Joliet, Rockford, Elgin, Springfield, Peoria. Cities were chosen by the Census Bureau's 2025 population estimates.
Where does the Illinois forecast come from?
From the National Weather Service forecast offices that cover Illinois. Each city page shows that office's forecast for the city's own grid square.