Ranked from NOAA 1991-2020 Climate Normals
Wettest Counties in Iowa
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.
Iowa ranked
| # | County | Annual rainfall | FEMA risk rating | Median home |
|---|---|---|---|---|
| 1 | Chickasaw County | 40.6" | Very Low | $164,400 |
| 2 | Wayne County | 40.4" | Very Low | $102,300 |
| 3 | Jones County | 40.1" | Very Low | $183,400 |
| 4 | Van Buren County | 39.7" | Very Low | $118,800 |
| 5 | Fayette County | 39.5" | Relatively Low | $130,800 |
| 6 | Lee County | 39.2" | Relatively Low | $123,600 |
| 7 | Allamakee County | 39.2" | Very Low | $171,900 |
| 8 | Boone County | 39.1" | Very Low | $191,200 |
| 9 | Davis County | 39.1" | Relatively Low | $146,000 |
| 10 | Louisa County | 38.8" | Very Low | $137,600 |
| 11 | Clayton County | 38.8" | Very Low | $155,700 |
| 12 | Linn County | 38.8" | Relatively Moderate | $204,400 |
| 13 | Clarke County | 38.7" | Very Low | $160,200 |
| 14 | Mahaska County | 38.7" | Very Low | $140,900 |
| 15 | Bremer County | 38.6" | Very Low | $207,200 |
| 16 | Delaware County | 38.6" | Relatively Low | $168,700 |
| 17 | Henry County | 38.5" | Very Low | $148,600 |
| 18 | Taylor County | 38.4" | Very Low | $109,700 |
| 19 | Jefferson County | 38.4" | Very Low | $161,200 |
| 20 | Muscatine County | 38.3" | Relatively Low | $172,400 |
| 21 | Dubuque County | 38.2" | Relatively Low | $226,100 |
| 22 | Poweshiek County | 38.2" | Very Low | $184,200 |
| 23 | Franklin County | 38.1" | Very Low | $118,500 |
| 24 | Howard County | 38.0" | Very Low | $133,900 |
| 25 | Washington County | 37.9" | Relatively Low | $199,600 |
| 26 | Benton County | 37.9" | Very Low | $198,400 |
| 27 | Union County | 37.9" | Relatively Low | $117,800 |
| 28 | Des Moines County | 37.9" | Relatively Low | $137,000 |
| 29 | Hardin County | 37.9" | Relatively Low | $113,000 |
| 30 | Warren County | 37.8" | Very Low | $252,800 |
| 31 | Floyd County | 37.7" | Relatively Low | $133,300 |
| 32 | Iowa County | 37.7" | Very Low | $189,800 |
| 33 | Mitchell County | 37.6" | Very Low | $164,100 |
| 34 | Winneshiek County | 37.6" | Very Low | $239,000 |
| 35 | Marion County | 37.5" | Very Low | $211,100 |
| 36 | Keokuk County | 37.4" | Very Low | $112,200 |
| 37 | Decatur County | 37.4" | Very Low | $109,500 |
| 38 | Buchanan County | 37.4" | Very Low | $171,400 |
| 39 | Lucas County | 37.3" | Very Low | $117,000 |
| 40 | Hamilton County | 37.2" | Relatively Low | $132,300 |
| 41 | Montgomery County | 37.2" | Very Low | $109,900 |
| 42 | Cass County | 37.1" | Relatively Low | $133,300 |
| 43 | Guthrie County | 37.1" | Very Low | $163,900 |
| 44 | Polk County | 37.0" | Relatively Moderate | $248,400 |
| 45 | Wapello County | 37.0" | Relatively Low | $112,900 |
| 46 | Ringgold County | 37.0" | Very Low | $150,300 |
| 47 | Grundy County | 36.8" | Very Low | $180,500 |
| 48 | Jackson County | 36.7" | Very Low | $170,000 |
| 49 | Page County | 36.6" | Very Low | $120,000 |
| 50 | Adair County | 36.5" | Relatively Low | $140,600 |
| 51 | Cedar County | 36.5" | Very Low | $199,700 |
| 52 | Monroe County | 36.5" | Very Low | $135,900 |
| 53 | Pottawattamie County | 36.4" | Relatively Low | $183,600 |
| 54 | Black Hawk County | 36.3" | Relatively Low | $182,400 |
| 55 | Cerro Gordo County | 36.3" | Relatively Low | $154,100 |
| 56 | Clinton County | 36.2" | Relatively Low | $153,800 |
| 57 | Scott County | 36.2" | Relatively Moderate | $212,500 |
| 58 | Dallas County | 36.1" | Relatively Low | $333,400 |
| 59 | Appanoose County | 36.0" | Very Low | $119,800 |
| 60 | Winnebago County | 35.9" | Very Low | $132,300 |
| 61 | Story County | 35.9" | Relatively Low | $243,600 |
| 62 | Humboldt County | 35.8" | Very Low | $146,900 |
| 63 | Johnson County | 35.7" | Relatively Moderate | $293,100 |
| 64 | Worth County | 35.5" | Very Low | $142,300 |
| 65 | Butler County | 35.4" | Very Low | $156,500 |
| 66 | Greene County | 35.3" | Very Low | $140,500 |
| 67 | Adams County | 35.3" | Very Low | $116,900 |
| 68 | Tama County | 35.3" | Relatively Low | $139,900 |
| 69 | Jasper County | 35.1" | Relatively Low | $176,800 |
| 70 | Webster County | 35.1" | Relatively Low | $138,500 |
| 71 | Audubon County | 35.0" | Very Low | $110,400 |
| 72 | Mills County | 34.8" | Very Low | $228,700 |
| 73 | Madison County | 34.8" | Very Low | $236,900 |
| 74 | Harrison County | 34.4" | Very Low | $165,300 |
| 75 | Shelby County | 34.3" | Very Low | $156,200 |
| 76 | Hancock County | 34.3" | Very Low | $129,300 |
| 77 | Wright County | 34.3" | Very Low | $109,800 |
| 78 | Kossuth County | 34.1" | Very Low | $135,100 |
| 79 | Buena Vista County | 33.8" | Very Low | $146,900 |
| 80 | Calhoun County | 33.8" | Relatively Low | $114,400 |
| 81 | Carroll County | 33.7" | Relatively Low | $175,700 |
| 82 | Crawford County | 33.6" | Relatively Low | $136,300 |
| 83 | Palo Alto County | 33.6" | Very Low | $119,300 |
| 84 | Fremont County | 33.3" | Very Low | $147,500 |
| 85 | Sac County | 33.0" | Very Low | $138,400 |
| 86 | Pocahontas County | 32.8" | Very Low | $93,300 |
| 87 | Marshall County | 32.8" | Relatively Low | $134,100 |
| 88 | Monona County | 32.1" | Very Low | $122,600 |
| 89 | O'Brien County | 31.4" | Very Low | $158,900 |
| 90 | Cherokee County | 31.2" | Very Low | $145,100 |
| 91 | Osceola County | 30.2" | Very Low | $123,800 |
| 92 | Plymouth County | 30.0" | Relatively Low | $218,600 |
| 93 | Sioux County | 29.9" | Relatively Low | $235,600 |
| 94 | Dickinson County | 29.5" | Very Low | $251,600 |
| 95 | Ida County | 29.3" | Very Low | $108,800 |
| 96 | Lyon County | 29.3" | Very Low | $215,600 |
| 97 | Woodbury County | 29.3" | Relatively Moderate | $172,000 |
| 98 | Emmet County | 29.3" | Very Low | $106,200 |
| 99 | Clay County | 26.8" | Very Low | $171,500 |
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 Iowa