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Illinois winter weather risk

102 counties scored 1 rated Very High

Cook County has the highest winter weather risk in Illinois, scoring 100 out of 100 — rated "Very High" by FEMA's National Risk Index.

# County NRI score Rating NOAA events
2016–2026
1 Cook County 100 Very High 0
2 Champaign County 95.4 Relatively High 0
3 Will County 92.2 Relatively High 0
4 Vermilion County 91.1 Relatively High 0
5 Jackson County 90.9 Relatively High 0
6 Madison County 90.8 Relatively High 0
7 Sangamon County 90.7 Relatively High 0
8 Rock Island County 90.3 Relatively High 0
9 Williamson County 89.8 Relatively High 0
10 DuPage County 88.4 Relatively High 0
11 St. Clair County 87.2 Relatively High 0
12 Franklin County 86.7 Relatively High 0
13 Jefferson County 86.6 Relatively High 0
14 Peoria County 86.4 Relatively High 0
15 McLean County 85.3 Relatively High 0
16 Winnebago County 84.9 Relatively Moderate 0
17 Randolph County 83.5 Relatively Moderate 0
18 Tazewell County 79.5 Relatively Moderate 0
19 McHenry County 79.2 Relatively Moderate 0
20 Perry County 79.2 Relatively Moderate 0
21 Coles County 79 Relatively Moderate 0
22 Macon County 78.1 Relatively Moderate 0
23 Saline County 77.5 Relatively Moderate 0
24 Kane County 77.4 Relatively Moderate 0
25 Marion County 70.5 Relatively Moderate 0
26 LaSalle County 69.9 Relatively Moderate 0
27 White County 68.7 Relatively Moderate 0
28 Whiteside County 68.6 Relatively Moderate 0
29 Union County 66.9 Relatively Moderate 0
30 Macoupin County 65 Relatively Moderate 0
31 Johnson County 64.6 Relatively Moderate 0
32 Henry County 64.5 Relatively Moderate 0
33 Effingham County 63.8 Relatively Moderate 0
34 Douglas County 63.1 Relatively Moderate 0
35 Adams County 62.5 Relatively Moderate 0
36 Lake County 62.4 Relatively Moderate 0
37 Massac County 61.4 Relatively Moderate 0
38 Knox County 56 Relatively Low 0
39 Edgar County 55.7 Relatively Low 0
40 Moultrie County 54.6 Relatively Low 0
41 Montgomery County 54.3 Relatively Low 0
42 McDonough County 53.6 Relatively Low 0
43 Shelby County 53.6 Relatively Low 0
44 Richland County 53.2 Relatively Low 0
45 Hamilton County 53.1 Relatively Low 0
46 Fulton County 51.5 Relatively Low 0
47 Kendall County 50.2 Relatively Low 0
48 Clark County 49.4 Relatively Low 0
49 Lawrence County 49.2 Relatively Low 0
50 Gallatin County 46.5 Relatively Low 0
51 Morgan County 46.3 Relatively Low 0
52 Logan County 46.1 Relatively Low 0
53 Christian County 45.8 Relatively Low 0
54 Crawford County 44.6 Relatively Low 0
55 Stephenson County 44.3 Relatively Low 0
56 Bureau County 43.6 Relatively Low 0
57 Kankakee County 43.2 Relatively Low 0
58 Alexander County 43.1 Relatively Low 0
59 Clay County 41.7 Relatively Low 0
60 Piatt County 41.7 Relatively Low 0
61 Clinton County 41.6 Relatively Low 0
62 Livingston County 41.3 Relatively Low 0
63 Boone County 41.1 Relatively Low 0
64 Wabash County 40.8 Relatively Low 0
65 Cumberland County 40.7 Relatively Low 0
66 Washington County 40.4 Relatively Low 0
67 Wayne County 40.1 Relatively Low 0
68 Fayette County 39.8 Relatively Low 0
69 Jo Daviess County 39.6 Relatively Low 0
70 Hancock County 39 Relatively Low 0
71 Pulaski County 35.9 Relatively Low 0
72 Woodford County 35 Relatively Low 0
73 Edwards County 34.5 Relatively Low 0
74 Warren County 32.9 Relatively Low 0
75 DeKalb County 32.7 Relatively Low 0
76 Monroe County 32.6 Relatively Low 0
77 Pope County 32.3 Relatively Low 0
78 Bond County 31 Relatively Low 0
79 Carroll County 30.4 Relatively Low 0
80 De Witt County 30.4 Relatively Low 0
81 Lee County 29.6 Relatively Low 0
82 Mason County 29.5 Relatively Low 0
83 Menard County 28.9 Relatively Low 0
84 Jasper County 27.1 Relatively Low 0
85 Iroquois County 26.9 Relatively Low 0
86 Mercer County 26.9 Relatively Low 0
87 Grundy County 25.8 Relatively Low 0
88 Pike County 25.6 Relatively Low 0
89 Hardin County 24.2 Very Low 0
90 Marshall County 23.5 Very Low 0
91 Ford County 23 Very Low 0
92 Henderson County 22.5 Very Low 0
93 Cass County 21.7 Very Low 0
94 Jersey County 21.1 Very Low 0
95 Greene County 19.5 Very Low 0
96 Ogle County 19 Very Low 0
97 Schuyler County 17.1 Very Low 0
98 Putnam County 12.6 Very Low 0
99 Brown County 12 Very Low 0
100 Stark County 7.9 Very Low 0
101 Calhoun County 7.1 Very Low 0
102 Scott County 6.7 Very Low 0

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.

Winter Weather risk nationally:

Top 50 US counties

Other hazard risks in Illinois:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneHailStrong WindIce StormCold WaveLightningDroughtLandslideAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest winter weather risk county in Illinois?

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

How many counties in Illinois are rated Very High for winter weather risk?

1 of 102 scored Illinois counties are rated "Very High" for winter weather risk by FEMA's National Risk Index.

What causes winter weather risk in Illinois?

Winter weather risk captures expected losses from heavy snow, blizzards, and mixed precipitation. Highest scores appear in the Great Lakes snowbelt, northern Rockies, and interior Northeast, where lake-effect and orographic snowfall is frequent. Winter weather impacts transportation networks, utilities, agriculture, and population health.