Aurora hail storm history
Kane County·NOAA NCEI Storm Events Database·~75-day publication lag
Aurora lies in Kane County, part of the Chicago metropolitan area where atmospheric conditions favor hail formation from spring through early summer. The county's position west of Lake Michigan places it in a zone where warm, moist air from the Gulf collides with cool Canadian air masses, creating the instability that generates severe thunderstorms capable of producing large hail.
Check if your roof was damaged by recent hail
Hail risk in Aurora peaks during April, May, and June, when daytime heating and atmospheric wind shear reach levels conducive to organized storm development. March and July represent secondary risk months. The western and southern suburbs of the Chicago metro—including Aurora's location—experience more frequent hail than areas closer to the lakeshore, as lake-breeze boundaries can locally intensify storm cells during the spring and early summer season.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 96 recorded events, 51 (53%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
A report of 1.25 hail was relayed via mPING.
Dime to quarter size hail was reported near Route 34 and Game Farm Road.
Hail damage was reported to numerous vehicles in the 2300 block of Route 34.
A photo received shows hail larger than quarter size in Sheridan. Time was estimated by radar.
Multiple reports of hail ranging from 1 inch to 1.50 inches in diameter were received from Geneva.
Nickel to quarter size hail was reported.
Nickel to quarter size hail was reported in Oswego.
Golf ball sized hail was estimated in Yorkville with damage to siding on houses.
A train spotter measured hail 2.25 inches in diameter with a lot of golf ball size hail.
Quarter size hail was reported covering the ground near South 1st Street and Milner Avenue.
Hail between nickel and ping pong ball size was reported at multiple locations.
Nickel size hail was reported near Aurora.
Penny to nickel size hail was reported in DeKalb, including at the Northern Illinois University.
NOAA National Centers for Environmental Information Storm Events Database. Publication lag is approximately 75 days — current-year events may be incomplete.
NOAA Storm Events Database ↗