NOAA's National Centers for Environmental Information
County Mapping
County Average Temperature
March - May 1897
0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F
Iowa (Hover over a County)
Temp
Average Temperature
:
--
Anomaly:
--
Rank:
-- Coldest
Mean:
--
*Signifies a tie
**Insufficient variability in the data record renders rank insignificant
County
|
Value | Anomaly | Rank 131 Years | 1901- |
|---|---|---|---|---|
| Adair County | 45.7°F | -2.6°F | 16 | 48.3°F |
| Adams County | 46.0°F | -2.9°F | 12 | 48.9°F |
| Allamakee County | 44.0°F | -1.3°F | 42 | 45.3°F |
| Appanoose County | 48.3°F | -1.6°F | 29 | 50.0°F |
| Audubon County | 44.6°F | -2.9°F | 14 | 47.5°F |
| Benton County | 44.9°F | -2.5°F | 20 | 47.4°F |
| Black Hawk County | 44.1°F | -2.7°F | 18 | 46.7°F |
| Boone County | 45.5°F | -2.4°F | 24 | 47.9°F |
| Bremer County | 43.2°F | -2.5°F | 22 | 45.8°F |
| Buchanan County | 43.4°F | -2.9°F | 15 | 46.3°F |
| Buena Vista County | 42.6°F | -3.4°F | 12 | 46.0°F |
| Butler County | 43.5°F | -2.6°F | 22 | 46.1°F |
| Calhoun County | 43.8°F | -3.2°F | 13 | 47.0°F |
| Carroll County | 43.7°F | -3.5°F | 8 | 47.2°F |
| Cass County | 46.1°F | -2.6°F | 16 | 48.6°F |
| Cedar County | 46.6°F | -1.6°F | 35 | 48.2°F |
| Cerro Gordo County | 41.7°F | -3.4°F | 14 | 45.1°F |
| Cherokee County | 42.7°F | -3.5°F | 13 | 46.1°F |
| Chickasaw County | 42.4°F | -2.5°F | 22 | 44.9°F |
| Clarke County | 47.6°F | -1.7°F | 28 | 49.4°F |
| Clay County | 41.8°F | -3.5°F | 12 | 45.3°F |
| Clayton County | 44.4°F | -1.6°F | 36 | 46.0°F |
| Clinton County | 47.1°F | -1.0°F | 44 | 48.1°F |
| Crawford County | 43.7°F | -3.5°F | 10 | 47.3°F |
| Dallas County | 46.6°F | -2.3°F | 24 | 48.9°F |
| Davis County | 48.3°F | -1.8°F | 29 | 50.2°F |
| Decatur County | 48.2°F | -1.5°F | 32 | 49.8°F |
| Delaware County | 44.3°F | -1.8°F | 28 | 46.0°F |
| Des Moines County | 48.5°F | -1.8°F | 30 | 50.2°F |
| Dickinson County | 40.8°F | -3.7°F | 11 | 44.6°F |
| Dubuque County | 45.8°F | -0.6°F | 49 | 46.4°F |
| Emmet County | 40.9°F | -3.8°F | 9 | 44.6°F |
| Fayette County | 42.9°F | -2.4°F | 25 | 45.3°F |
| Floyd County | 42.5°F | -2.9°F | 20 | 45.4°F |
| Franklin County | 42.7°F | -3.0°F | 18 | 45.7°F |
| Fremont County | 48.0°F | -2.8°F | 12 | 50.8°F |
| Greene County | 44.8°F | -3.0°F | 14 | 47.8°F |
| Grundy County | 44.5°F | -2.3°F | 25 | 46.8°F |
| Guthrie County | 45.4°F | -2.8°F | 16 | 48.1°F |
| Hamilton County | 44.4°F | -2.5°F | 23 | 46.9°F |
| Hancock County | 41.7°F | -3.6°F | 13 | 45.3°F |
| Hardin County | 44.3°F | -2.3°F | 22 | 46.7°F |
| Harrison County | 46.1°F | -2.8°F | 17 | 48.9°F |
| Henry County | 48.3°F | -1.9°F | 30 | 50.1°F |
| Howard County | 41.3°F | -2.5°F | 20 | 43.8°F |
| Humboldt County | 43.9°F | -2.7°F | 20 | 46.5°F |
| Ida County | 43.2°F | -3.5°F | 11 | 46.7°F |
| Iowa County | 46.4°F | -1.9°F | 27 | 48.3°F |
| Jackson County | 46.9°F | -0.4°F | 54 | 47.4°F |
| Jasper County | 46.6°F | -2.0°F | 28 | 48.6°F |
| Jefferson County | 47.9°F | -2.0°F | 27 | 49.9°F |
| Johnson County | 46.3°F | -2.2°F | 22 | 48.5°F |
| Jones County | 46.1°F | -1.0°F | 43 | 47.1°F |
| Keokuk County | 47.3°F | -1.7°F | 32 | 49.0°F |
| Kossuth County | 41.8°F | -3.5°F | 13 | 45.3°F |
| Lee County | 49.2°F | -1.9°F | 28 | 51.1°F |
| Linn County | 44.9°F | -2.3°F | 18 | 47.2°F |
| Louisa County | 48.0°F | -1.8°F | 31 | 49.7°F |
| Lucas County | 47.8°F | -1.8°F | 29 | 49.6°F |
| Lyon County | 41.8°F | -3.5°F | 12 | 45.3°F |
| Madison County | 47.0°F | -2.1°F | 27 | 49.1°F |
| Mahaska County | 47.7°F | -1.5°F | 37 | 49.2°F |
| Marion County | 48.0°F | -1.7°F | 32 | 49.7°F |
| Marshall County | 45.6°F | -2.0°F | 26 | 47.6°F |
| Mills County | 47.5°F | -2.7°F | 15 | 50.2°F |
| Mitchell County | 41.3°F | -3.1°F | 18 | 44.5°F |
| Monona County | 45.0°F | -3.2°F | 14 | 48.1°F |
| Monroe County | 48.1°F | -1.7°F | 30 | 49.9°F |
| Montgomery County | 46.7°F | -2.9°F | 11 | 49.6°F |
| Muscatine County | 47.4°F | -1.8°F | 29 | 49.2°F |
| O'Brien County | 41.8°F | -3.7°F | 11 | 45.5°F |
| Osceola County | 40.9°F | -3.8°F | 10 | 44.7°F |
| Page County | 47.3°F | -2.8°F | 10 | 50.1°F |
| Palo Alto County | 42.1°F | -3.3°F | 14 | 45.4°F |
| Plymouth County | 43.4°F | -3.2°F | 15 | 46.6°F |
| Pocahontas County | 43.4°F | -3.0°F | 16 | 46.4°F |
| Polk County | 47.2°F | -2.0°F | 27 | 49.2°F |
| Pottawattamie County | 46.9°F | -2.5°F | 17 | 49.3°F |
| Poweshiek County | 46.5°F | -1.6°F | 34 | 48.1°F |
| Ringgold County | 47.6°F | -1.7°F | 30 | 49.3°F |
| Sac County | 43.0°F | -3.6°F | 11 | 46.6°F |
| Scott County | 47.2°F | -1.4°F | 35 | 48.6°F |
| Shelby County | 45.1°F | -2.9°F | 13 | 48.0°F |
| Sioux County | 42.5°F | -3.5°F | 14 | 46.0°F |
| Story County | 45.6°F | -2.2°F | 25 | 47.8°F |
| Tama County | 45.4°F | -2.0°F | 30 | 47.4°F |
| Taylor County | 46.9°F | -2.4°F | 18 | 49.3°F |
| Union County | 46.6°F | -2.2°F | 23 | 48.8°F |
| Van Buren County | 48.6°F | -2.0°F | 28 | 50.6°F |
| Wapello County | 48.0°F | -1.8°F | 30 | 49.8°F |
| Warren County | 48.1°F | -1.7°F | 31 | 49.8°F |
| Washington County | 47.4°F | -1.8°F | 32 | 49.1°F |
| Wayne County | 48.1°F | -1.7°F | 32 | 49.7°F |
| Webster County | 44.5°F | -2.5°F | 22 | 47.0°F |
| Winnebago County | 40.6°F | -4.0°F | 8 | 44.6°F |
| Winneshiek County | 42.3°F | -2.0°F | 29 | 44.3°F |
| Woodbury County | 44.2°F | -3.2°F | 14 | 47.4°F |
| Worth County | 40.9°F | -3.5°F | 11 | 44.5°F |
| Wright County | 43.1°F | -2.9°F | 18 | 46.1°F |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: County Mapping, published August 2025, retrieved on August 14, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
