Illinois Hail Statistics

Illinois averages 270 reports of 1-inch or larger hail a year, on 32.6 hail days. That ranks 10th of 51 and is 4% of all such reports in the US. Hail peaks in May.

Data: NOAA Storm Events, 2021–2025 yearly averages

270Reports of 1-inch+ hail a year, 10th most

32.6Hail days a year, 12th most

4.00 inLargest stone reported, April 4, 2023

When hail falls in Illinois

314 hail reports a year in all, 26.2 of them 2 inches or larger.
The most reports of 1-inch+ hail: Cook County, about 18.6 a year.
The most reports come in May; nationally the peak is May.

Share of Illinois hail reports by month, 2021–2025.

Hail by county in Illinois

101 counties with at least one hail report, 2021–2025. Yearly averages, sorted by 1-inch+ reports. More people means more reports, so populous counties tend to rank higher.

Hail statistics by county in Illinois. Column headers sort the table.

Cook	18.6	18.8	4.2	2.00 in
Sangamon	12.0	16.0	4.2	3.25 in
Kane	8.6	9.0	1.6	2.50 in
McLean	7.6	9.8	2.8	2.50 in
Henry	7.6	8.4	2.8	3.00 in
Lake	7.4	7.6	2.2	2.00 in
McDonough	7.2	8.2	2.6	2.50 in
Christian	6.8	7.4	3.2	2.50 in
Madison	6.8	6.8	2.0	3.75 in
Fulton	6.6	9.0	4.0	4.00 in
St. Clair	6.4	6.4	2.6	2.50 in
Macon	6.2	7.6	2.0	2.50 in
DuPage	6.2	6.2	1.4	2.50 in
Will	6.2	6.2	2.8	1.75 in
Peoria	5.2	7.8	3.4	1.75 in
Lee	5.2	5.2	1.2	2.00 in
Bureau	5.2	5.2	1.8	2.00 in
Kendall	5.2	5.2	1.0	3.00 in
Logan	5.0	5.6	2.0	2.00 in
Winnebago	4.8	4.8	2.0	2.00 in
Tazewell	4.4	8.2	3.6	3.00 in
Woodford	4.2	4.6	2.4	2.50 in
LaSalle	4.2	4.4	1.4	2.50 in
Monroe	4.0	4.0	1.8	2.75 in
McHenry	4.0	4.0	1.6	2.50 in
Champaign	3.6	7.2	3.2	2.50 in
Morgan	3.4	4.4	2.4	4.00 in
Jackson	3.4	3.8	2.4	2.00 in
Williamson	3.2	4.6	2.8	3.00 in
Montgomery	3.2	3.2	1.2	2.75 in
Hancock	2.8	2.8	1.0	3.00 in
Macoupin	2.8	2.8	2.4	2.00 in
Washington	2.8	2.8	1.4	2.50 in
Whiteside	2.6	3.2	2.0	1.75 in
Douglas	2.6	3.2	1.8	3.25 in
Richland	2.6	3.0	1.4	2.00 in
Randolph	2.4	2.4	2.0	2.50 in
Franklin	2.2	2.6	1.8	1.75 in
Livingston	2.2	2.2	1.4	3.00 in
Vermilion	2.0	2.8	2.0	2.00 in
Stephenson	2.0	2.2	1.4	3.00 in
Adams	2.0	2.0	1.6	3.50 in
Ogle	2.0	2.0	1.4	2.00 in
DeKalb	2.0	2.0	1.2	2.75 in
Mercer	1.8	2.8	1.2	1.75 in
Marion	1.8	1.8	0.8	1.75 in
Rock Island	1.6	3.2	1.8	1.00 in
Coles	1.6	2.0	1.4	1.75 in
Effingham	1.6	2.0	1.2	1.75 in
Boone	1.6	1.8	1.2	1.75 in
Moultrie	1.6	1.8	1.4	1.75 in
Kankakee	1.6	1.6	1.4	1.25 in
Pike	1.6	1.6	1.2	2.00 in
Jasper	1.6	1.6	0.6	2.50 in
Menard	1.4	2.0	1.4	1.75 in
Edgar	1.4	2.0	1.2	1.75 in
De Witt	1.4	2.0	1.0	1.75 in
Carroll	1.4	1.8	1.2	1.25 in
Brown	1.4	1.4	1.4	2.75 in
Crawford	1.4	1.4	0.6	3.00 in
Lawrence	1.2	1.6	1.2	1.25 in
Warren	1.2	1.4	1.2	1.75 in
Perry	1.2	1.4	1.2	1.75 in
Schuyler	1.2	1.4	1.0	1.75 in
Iroquois	1.2	1.2	0.6	1.25 in
Ford	1.2	1.2	0.8	1.75 in
Piatt	1.2	1.2	0.8	1.75 in
Clinton	1.2	1.2	0.8	2.00 in
Jo Daviess	1.0	1.4	1.0	1.75 in
Mason	1.0	1.2	0.6	1.75 in
Johnson	1.0	1.0	1.0	2.00 in
Fayette	1.0	1.0	1.0	1.75 in
Pulaski	1.0	1.0	0.4	2.75 in
Shelby	1.0	1.0	0.8	1.25 in
Saline	0.8	1.8	1.6	1.75 in
Jefferson	0.8	1.4	1.2	1.25 in
Union	0.8	1.2	1.0	1.75 in
Hamilton	0.8	1.0	0.8	1.25 in
Cass	0.8	0.8	0.4	1.50 in
Knox	0.6	1.6	1.6	1.75 in
Clay	0.6	1.0	1.0	1.00 in
Marshall	0.6	1.0	0.4	1.75 in
Massac	0.6	0.8	0.8	1.00 in
Clark	0.6	0.8	0.8	2.50 in
Wabash	0.6	0.8	0.8	1.75 in
Edwards	0.6	0.8	0.8	1.75 in
Cumberland	0.6	0.8	0.6	1.75 in
Calhoun	0.6	0.6	0.6	2.00 in
Greene	0.6	0.6	0.6	1.75 in
Bond	0.6	0.6	0.6	2.25 in
Gallatin	0.4	0.6	0.6	1.00 in
Alexander	0.4	0.6	0.6	1.00 in
Grundy	0.4	0.4	0.4	1.00 in
Putnam	0.4	0.4	0.4	1.00 in
Jersey	0.4	0.4	0.4	1.00 in
White	0.2	0.6	0.6	1.00 in
Scott	0.2	0.6	0.6	1.75 in
Wayne	0.2	0.4	0.4	1.50 in
Pope	0.2	0.2	0.2	1.00 in
Henderson	0.2	0.2	0.2	1.00 in
Stark	0.2	0.2	0.2	1.00 in

About these numbers

Hail reports from the NOAA Storm Events Database, 2021–2025, averaged per year. These are reports to the National Weather Service, not every storm: places with more people report more hail. Full methodology.

Cite: Home Stats Data, "Illinois Hail Statistics," https://homestatsdata.com/storm-risk/hail-statistics/illinois/