Illinois was hit as recently as 2026-07-28, 3 days ago. NOAA's Storm Prediction Center has logged 550 separate hail days in Illinois since 2010, across 4,765 individual storm reports. 120 of those days brought hail 2 inches or larger, and the largest stone on record is 6.1 inches on 2026-03-10 near Kankakee.
Illinois sees damaging hail from central Springfield and Peoria up through the Chicago collar counties. Pick a date below to see the NOAA radar swath and reports, or check a specific address.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Illinois. Radar-indicated, not a guarantee of damage.
A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Illinois addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->Illinois averages 32 reported hail days a year across 17 years of NOAA archive, about 7 of them carrying hail 2″ or larger -- the size that routinely totals roofs. Major metros watched here: Chicago, Springfield, Peoria, Rockford.
Illinois's busiest hail month is June, with 108 of its 550 hail days on record. March through August holds 473 of them, 86% of the record.
| Month | Hail days since 2010 |
|---|---|
| January | 6 |
| February | 14 |
| March | 54 |
| April | 85 |
| May | 99 |
| June | 108 |
| July | 70 |
| August | 57 |
| September | 26 |
| October | 16 |
| November | 11 |
| December | 4 |
| County | Hail days since 2010 | Largest stone |
|---|---|---|
| Cook | 75 | 2.75″ |
| Will | 56 | 3.00″ |
| Madison | 54 | 3.75″ |
| Sangamon | 48 | 3.25″ |
| St. Clair | 47 | 3.00″ |
| Kane | 43 | 2.50″ |
68 Illinois counties have at least 13 NOAA hail days on record since 2010 -- enough archive signal for a page of their own. Ordered by hail days.
Cook County · Will County · Madison County · Sangamon County · St. Clair County · Kane County · Winnebago County · Adams County · Vermilion County · Peoria County · Fulton County · Macoupin County · Tazewell County · Henry County · Hancock County · McHenry County · DuPage County · La Salle County · Champaign County · Bureau County · Christian County · Kankakee County · Jackson County · McDonough County · Whiteside County · Knox County · Ogle County · Franklin County · Macon County · McLean County · Monroe County · Morgan County · Rock Island County · Williamson County · Woodford County · Lake County · Coles County · Marion County · Randolph County · Stephenson County · Warren County · Boone County · De Kalb County · Johnson County · Livingston County · Jefferson County · Jo Daviess County · Lee County · Logan County · Montgomery County · Washington County · Perry County · Clark County · Iroquois County · Kendall County · Menard County · Moultrie County · Pike County · Clinton County · Edgar County · Effingham County · Lawrence County · Brown County · Clay County · Grundy County · Shelby County · Douglas County · Mercer County
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-28 | 2.00″ | 1 |
| 2026-07-26 | 1.00″ | 1 |
| 2026-07-03 | 1.00″ | 2 |
| 2026-06-24 | 1.50″ | 9 |
| 2026-06-21 | 1.00″ | 2 |
| 2026-06-17 | 3.00″ | 30 |
| 2026-06-16 | 1.75″ | 8 |
| 2026-06-11 | 1.75″ | 4 |
The colored swath is NOAA's MRMS radar estimate of the largest hail in each ~1 km cell; the dots are individual SPC ground reports. Yellow is around an inch, red is 1.5 to 2″, and purple is 2″ and up -- see how hail size maps to roof damage. Click any spot on the map to see the hail history at that point, or look up a full street address on the hail history by address tool. Today's nationwide activity is on today's hail report.
North Dakota · Arkansas · New Mexico · Wyoming · North Carolina · Georgia
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.