Illinois Tornado Facts

Illinois houses the Windy City, but the title can be extended to the entire state.

  • As the most populous state in the Tornado Alley, Illinois’s tornados are much more disastrous and deadly.
  • Illinois has an average of 35 tornados a year. Learn more about monthly tornado averages in Illinois here.
  • For about every 10,000 square miles in Illinois, there will be an average of 5 tornados reported that year.
  • The deadliest tornado in U.S. history was the Tri-State Tornado of 1925 which killed 695 people in Illinois, Missouri, and Indiana; 613 of these people were in Illinois.
  • The deadliest tornado in Chicago occurred in 1967. 33 people were killed when an EF-4 tornado struck Oak Lawn and Palos Hills.
  • In recent Illinois history, Cook County has the highest number of confirmed tornados at 38 tornados.
  • The most common time range for a tornado in Illinois to hit is between the hours of 2 p.m. and 7 p.m.
  • The most common hour in the day for tornados to hit Illinois is about 5 p.m.
  • The most common month for tornados in Illinois is April.
  • Central and Southeast Illinois are the most likely to be affected by tornados.

It’s important to note that tornados can happen any time of the day and any time of the year. Make sure your loved ones in Illinois are protected by letting our expert technicians install a custom tornado shelter like our above ground tornado sheltersRequest more information today!

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