Ranked from NOAA 1991-2020 Climate Normals
Wettest Counties in Illinois
Total annual precipitation by county, wettest first. Rainfall drives roof and siding wear, basement water, and in much of the country the flood component of the insurance premium. Figures are NOAA 1991-2020 Climate Normals from the weather station nearest each county seat, so they describe a thirty-year average rather than any single year.
Where does yours land?
Every county in America is somewhere on this scale, including the one you live in.
Illinois ranked
| # | County | Annual rainfall | FEMA risk rating | Median home |
|---|---|---|---|---|
| 1 | Union County | 51.1" | Relatively Low | $131,700 |
| 2 | Hardin County | 50.9" | Very Low | $91,700 |
| 3 | Johnson County | 50.5" | Relatively Low | $148,200 |
| 4 | Pope County | 50.5" | Very Low | $165,300 |
| 5 | Massac County | 50.3" | Relatively Low | $118,000 |
| 6 | Pulaski County | 49.4" | Relatively Low | $81,000 |
| 7 | Richland County | 48.8" | Relatively Low | $106,600 |
| 8 | Wabash County | 48.7" | Very Low | $103,900 |
| 9 | White County | 48.3" | Relatively Low | $100,100 |
| 10 | Gallatin County | 48.2" | Very Low | $84,700 |
| 11 | Clay County | 48.0" | Very Low | $94,300 |
| 12 | Alexander County | 47.9" | Relatively Low | $58,700 |
| 13 | Saline County | 47.6" | Relatively Low | $92,900 |
| 14 | Hamilton County | 47.1" | Very Low | $108,800 |
| 15 | Lawrence County | 46.6" | Relatively Low | $95,500 |
| 16 | Jasper County | 46.0" | Very Low | $122,900 |
| 17 | Edwards County | 46.0" | Very Low | $97,500 |
| 18 | Wayne County | 46.0" | Very Low | $109,400 |
| 19 | Marion County | 45.9" | Relatively Low | $100,100 |
| 20 | Clinton County | 45.9" | Relatively Low | $180,500 |
| 21 | Randolph County | 45.6" | Relatively Low | $134,100 |
| 22 | Clark County | 45.5" | Very Low | $123,100 |
| 23 | Crawford County | 45.5" | Very Low | $113,700 |
| 24 | Jefferson County | 45.0" | Relatively Low | $118,400 |
| 25 | Effingham County | 44.0" | Relatively Low | $179,800 |
| 26 | Franklin County | 44.0" | Relatively Low | $87,700 |
| 27 | Jackson County | 44.0" | Relatively Moderate | $125,000 |
| 28 | Perry County | 44.0" | Relatively Low | $105,200 |
| 29 | Williamson County | 44.0" | Relatively Moderate | $145,600 |
| 30 | Bond County | 43.4" | Very Low | $133,100 |
| 31 | Madison County | 43.4" | Relatively Moderate | $167,900 |
| 32 | St. Clair County | 43.4" | Relatively High | $168,800 |
| 33 | Vermilion County | 43.2" | Relatively Low | $92,900 |
| 34 | Edgar County | 42.7" | Very Low | $95,700 |
| 35 | Jersey County | 42.2" | Very Low | $168,800 |
| 36 | Washington County | 42.2" | Relatively Low | $149,800 |
| 37 | Montgomery County | 42.1" | Relatively Low | $102,200 |
| 38 | Kankakee County | 41.7" | Relatively Moderate | $185,700 |
| 39 | Moultrie County | 41.6" | Relatively Low | $121,500 |
| 40 | Shelby County | 41.4" | Relatively Low | $130,400 |
| 41 | Calhoun County | 41.3" | Very Low | $174,000 |
| 42 | Fayette County | 41.2" | Relatively Low | $114,700 |
| 43 | Fulton County | 41.0" | Relatively Low | $102,500 |
| 44 | Mason County | 41.0" | Relatively Low | $106,100 |
| 45 | Schuyler County | 40.9" | Very Low | $106,200 |
| 46 | Monroe County | 40.8" | Very Low | $265,600 |
| 47 | Douglas County | 40.5" | Relatively Low | $142,600 |
| 48 | Knox County | 40.5" | Relatively Low | $104,900 |
| 49 | Pike County | 40.5" | Very Low | $100,100 |
| 50 | Sangamon County | 40.5" | Relatively Moderate | $170,300 |
| 51 | Macon County | 40.4" | Relatively Moderate | $121,800 |
| 52 | Scott County | 40.4" | Very Low | $101,700 |
| 53 | Ford County | 40.4" | Very Low | $118,100 |
| 54 | Carroll County | 40.3" | Very Low | $113,500 |
| 55 | DuPage County | 40.2" | Relatively High | $374,100 |
| 56 | Hancock County | 40.1" | Very Low | $108,400 |
| 57 | Macoupin County | 40.0" | Relatively Low | $126,100 |
| 58 | Logan County | 39.8" | Relatively Low | $125,900 |
| 59 | Bureau County | 39.8" | Relatively Low | $121,900 |
| 60 | Piatt County | 39.6" | Very Low | $173,200 |
| 61 | Greene County | 39.6" | Very Low | $94,400 |
| 62 | Stark County | 39.6" | Very Low | $103,500 |
| 63 | Lake County | 39.5" | Relatively High | $326,600 |
| 64 | Warren County | 39.4" | Very Low | $101,300 |
| 65 | McLean County | 39.4" | Relatively Moderate | $198,300 |
| 66 | Jo Daviess County | 39.4" | Relatively Low | $193,900 |
| 67 | McHenry County | 39.4" | Relatively Moderate | $286,900 |
| 68 | Morgan County | 39.3" | Relatively Low | $128,700 |
| 69 | Mercer County | 39.1" | Very Low | $139,300 |
| 70 | Henry County | 39.1" | Relatively Low | $145,300 |
| 71 | Brown County | 39.1" | Very Low | $142,200 |
| 72 | Grundy County | 38.8" | Relatively Low | $259,200 |
| 73 | Putnam County | 38.6" | Very Low | $167,800 |
| 74 | McDonough County | 38.5" | Very Low | $103,500 |
| 75 | Iroquois County | 38.4" | Relatively Low | $125,400 |
| 76 | Marshall County | 38.4" | Very Low | $137,800 |
| 77 | Stephenson County | 38.4" | Relatively Low | $127,500 |
| 78 | Whiteside County | 38.3" | Relatively Low | $125,800 |
| 79 | Rock Island County | 38.3" | Relatively Moderate | $144,700 |
| 80 | Christian County | 38.1" | Relatively Low | $112,100 |
| 81 | Cass County | 38.0" | Very Low | $95,500 |
| 82 | Will County | 38.0" | Relatively High | $298,000 |
| 83 | Henderson County | 37.9" | Very Low | $101,600 |
| 84 | Menard County | 37.6" | Very Low | $179,300 |
| 85 | Peoria County | 37.5" | Relatively Moderate | $152,600 |
| 86 | Tazewell County | 37.5" | Relatively Moderate | $164,500 |
| 87 | Woodford County | 37.5" | Very Low | $193,800 |
| 88 | DeKalb County | 37.3" | Relatively Low | $231,900 |
| 89 | Boone County | 37.2" | Relatively Low | $198,600 |
| 90 | Lee County | 37.2" | Relatively Low | $155,100 |
| 91 | Ogle County | 37.2" | Relatively Low | $184,100 |
| 92 | Winnebago County | 37.2" | Relatively Moderate | $155,100 |
| 93 | Champaign County | 37.0" | Relatively Moderate | $205,100 |
| 94 | Livingston County | 37.0" | Relatively Low | $131,500 |
| 95 | Adams County | 36.4" | Relatively Low | $155,900 |
| 96 | De Witt County | 36.4" | Very Low | $124,200 |
| 97 | LaSalle County | 36.2" | Relatively Moderate | $154,900 |
| 98 | Coles County | 36.0" | Relatively Low | $121,900 |
| 99 | Cumberland County | 36.0" | Very Low | $117,700 |
| 100 | Kendall County | 33.8" | Relatively Low | $298,900 |
| 101 | Cook County | 33.2" | Very High | $305,200 |
| 102 | Kane County | 33.2" | Relatively High | $303,000 |
Every figure is modelled on the county's own median home with 20% down at 7.03%. Property tax and electricity are county and state specific; homeowners insurance uses the NAIC average premium for that state, which ranges from 0.16% of home value in Hawaii to 1.16% in Oklahoma. Maintenance and water are national estimates. Full methodology.
Nationwide
Wettest Counties across all 3,133 US counties · Every county in Illinois