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Illinois hail risk

102 counties scored 0 rated Very High

Cook County has the highest hail risk in Illinois, scoring 99.1 out of 100 — rated "Relatively High" by FEMA's National Risk Index. Recorded hail events across Illinois have increased 20% over the past five years compared to the prior five-year period.

# County NRI score Rating NOAA events
2016–2026
1 Cook County 99.1 Relatively High 180
2 Douglas County 97.6 Relatively High 22
3 St. Clair County 97.6 Relatively High 55
4 Madison County 97.2 Relatively High 61
5 Winnebago County 97.1 Relatively High 61
6 Sangamon County 95.6 Relatively High 124
7 Peoria County 95.3 Relatively High 98
8 Stephenson County 93.3 Relatively Moderate 32
9 Rock Island County 91.8 Relatively Moderate 28
10 Champaign County 90.4 Relatively Moderate 78
11 Ogle County 88.5 Relatively Moderate 20
12 Lake County 88.4 Relatively Moderate 62
13 McLean County 88.3 Relatively Moderate 69
14 Macoupin County 87.8 Relatively Moderate 24
15 Fulton County 87.6 Relatively Moderate 82
16 Macon County 84.8 Relatively Moderate 52
17 Jo Daviess County 84.6 Relatively Moderate 18
18 Whiteside County 84.3 Relatively Moderate 38
19 Knox County 83.8 Relatively Moderate 35
20 Vermilion County 83.4 Relatively Moderate 70
21 Tazewell County 82.1 Relatively Moderate 88
22 Randolph County 82 Relatively Moderate 22
23 Bureau County 80.5 Relatively Moderate 47
24 Boone County 79.6 Relatively Moderate 17
25 McHenry County 79.5 Relatively Moderate 32
26 Williamson County 78.3 Relatively Moderate 46
27 Adams County 78.1 Relatively Moderate 31
28 Jackson County 78.1 Relatively Moderate 37
29 Henry County 76.9 Relatively Moderate 85
30 Jefferson County 75.4 Relatively Moderate 15
31 Montgomery County 74.8 Relatively Moderate 20
32 Henderson County 74.5 Relatively Moderate 10
33 McDonough County 74.4 Relatively Moderate 58
34 Carroll County 73.1 Relatively Moderate 16
35 Clinton County 72.8 Relatively Low 10
36 Franklin County 72.8 Relatively Low 27
37 Lee County 72.4 Relatively Low 35
38 Coles County 69.9 Relatively Low 24
39 Logan County 69.8 Relatively Low 35
40 Perry County 69.1 Relatively Low 22
41 Morgan County 68.7 Relatively Low 38
42 Iroquois County 66.8 Relatively Low 14
43 Johnson County 66.5 Relatively Low 10
44 Hancock County 65.6 Relatively Low 55
45 Warren County 65.4 Relatively Low 17
46 Kankakee County 65.3 Relatively Low 35
47 Moultrie County 65.2 Relatively Low 21
48 Mason County 63.7 Relatively Low 11
49 Kane County 63.6 Relatively Low 81
50 Christian County 62.3 Relatively Low 52
51 LaSalle County 61.9 Relatively Low 38
52 Effingham County 60.9 Relatively Low 27
53 Will County 60.6 Relatively Low 95
54 Monroe County 60.2 Relatively Low 32
55 Washington County 59 Relatively Low 18
56 Marion County 58 Relatively Low 10
57 Schuyler County 58 Relatively Low 13
58 Fayette County 56.4 Relatively Low 7
59 Edgar County 55.7 Relatively Low 17
60 Saline County 54.9 Relatively Low 27
61 Bond County 54.8 Relatively Low 4
62 DuPage County 53.8 Relatively Low 62
63 Menard County 51.6 Relatively Low 17
64 Richland County 51 Relatively Low 18
65 Pike County 50.1 Relatively Low 17
66 Shelby County 49.6 Relatively Low 11
67 White County 48 Relatively Low 10
68 Crawford County 47 Relatively Low 14
69 Ford County 46.7 Relatively Low 11
70 Clark County 45.9 Relatively Low 14
71 Clay County 44 Relatively Low 20
72 Piatt County 43.6 Relatively Low 12
73 De Witt County 43 Relatively Low 15
74 Massac County 40.9 Relatively Low 12
75 Greene County 40.8 Relatively Low 4
76 Livingston County 39.4 Relatively Low 28
77 Cass County 38.7 Relatively Low 16
78 Union County 38.2 Relatively Low 8
79 Jersey County 35.6 Relatively Low 5
80 DeKalb County 35.1 Relatively Low 26
81 Hamilton County 35.1 Relatively Low 10
82 Cumberland County 34 Relatively Low 6
83 Gallatin County 32.8 Very Low 4
84 Lawrence County 32.4 Very Low 13
85 Jasper County 30.6 Very Low 13
86 Mercer County 29.5 Very Low 21
87 Stark County 29.4 Very Low 4
88 Wayne County 28 Very Low 11
89 Alexander County 24 Very Low 10
90 Kendall County 23.4 Very Low 40
91 Brown County 22.8 Very Low 10
92 Wabash County 22.3 Very Low 7
93 Edwards County 21.7 Very Low 5
94 Pope County 18.8 Very Low 3
95 Woodford County 18.4 Very Low 44
96 Pulaski County 16.5 Very Low 10
97 Hardin County 16.4 Very Low 2
98 Marshall County 15.7 Very Low 9
99 Putnam County 15.3 Very Low 8
100 Calhoun County 14.6 Very Low 6
101 Scott County 14.2 Very Low 8
102 Grundy County 12 Very Low 7

Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.

Hail risk nationally:

Top 50 US counties

Other hazard risks in Illinois:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneStrong WindWinter WeatherIce StormCold WaveLightningDroughtLandslideAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest hail risk county in Illinois?

Cook County, IL has the highest hail risk in Illinois, with a FEMA National Risk Index score of 99.1 out of 100 (rated "Relatively High").

What causes hail risk in Illinois?

Hail risk reflects expected annual losses from damaging hailstones to structures, vehicles, and crops. High scores cluster in the central plains and Front Range — a corridor sometimes called "Hail Alley" — where large-diameter hail is most frequent. Hail causes over $10 billion in US property damage in active years, much of it to roofs, vehicles, and crops.