Illinois lightning map
Illinois sits in a classic Midwest storm corridor where Gulf moisture and Plains fronts collide, firing severe storms from spring into summer.
Cities in Illinois
Track lightning anywhere in Illinois.
Get live distance, storm trend, and free alerts for your exact location.
Frequently asked
How many thunderstorm days does Illinois get?
Illinois averages about 42 thunderstorm days a year, versus a US average near 25. Activity peaks April–September.
When is thunderstorm season in Illinois?
Lightning is most frequent April–September in Illinois.