NOAA's National Centers for Environmental Information
County Mapping
County Average Temperature
March - May 1921
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 | 52.6°F | 4.2°F | 128 | 48.3°F |
| Adams County | 52.9°F | 4.0°F | 125 | 48.9°F |
| Allamakee County | 50.2°F | 4.9°F | 127 | 45.3°F |
| Appanoose County | 54.4°F | 4.4°F | 128 | 50.0°F |
| Audubon County | 51.7°F | 4.1°F | 126 | 47.5°F |
| Benton County | 52.5°F | 5.1°F | 129 | 47.4°F |
| Black Hawk County | 51.6°F | 4.9°F | 128 | 46.7°F |
| Boone County | 52.5°F | 4.6°F | 127 | 47.9°F |
| Bremer County | 50.4°F | 4.6°F | 125 | 45.8°F |
| Buchanan County | 51.0°F | 4.7°F | 127 | 46.3°F |
| Buena Vista County | 49.9°F | 4.0°F | 124 | 46.0°F |
| Butler County | 50.5°F | 4.4°F | 126 | 46.1°F |
| Calhoun County | 51.1°F | 4.1°F | 126 | 47.0°F |
| Carroll County | 51.2°F | 4.1°F | 125 | 47.2°F |
| Cass County | 52.6°F | 3.9°F | 125 | 48.6°F |
| Cedar County | 52.9°F | 4.7°F | 127 | 48.2°F |
| Cerro Gordo County | 49.4°F | 4.4°F | 125 | 45.1°F |
| Cherokee County | 50.1°F | 4.0°F | 122 | 46.1°F |
| Chickasaw County | 49.4°F | 4.5°F | 126 | 44.9°F |
| Clarke County | 53.8°F | 4.4°F | 128 | 49.4°F |
| Clay County | 49.3°F | 4.0°F | 122 | 45.3°F |
| Clayton County | 50.6°F | 4.7°F | 127 | 46.0°F |
| Clinton County | 53.0°F | 4.9°F | 128 | 48.1°F |
| Crawford County | 52.0°F | 4.7°F | 127 | 47.3°F |
| Dallas County | 53.3°F | 4.4°F | 127 | 48.9°F |
| Davis County | 54.7°F | 4.5°F | 128 | 50.2°F |
| Decatur County | 54.2°F | 4.4°F | 127 | 49.8°F |
| Delaware County | 50.6°F | 4.6°F | 127 | 46.0°F |
| Des Moines County | 54.8°F | 4.6°F | 128 | 50.2°F |
| Dickinson County | 48.4°F | 3.9°F | 120 | 44.6°F |
| Dubuque County | 51.2°F | 4.7°F | 128 | 46.4°F |
| Emmet County | 48.5°F | 3.9°F | 117 | 44.6°F |
| Fayette County | 49.9°F | 4.6°F | 127 | 45.3°F |
| Floyd County | 49.6°F | 4.2°F | 124 | 45.4°F |
| Franklin County | 50.1°F | 4.4°F | 126 | 45.7°F |
| Fremont County | 55.0°F | 4.2°F | 127 | 50.8°F |
| Greene County | 52.2°F | 4.4°F | 127 | 47.8°F |
| Grundy County | 51.5°F | 4.8°F | 127 | 46.8°F |
| Guthrie County | 52.3°F | 4.2°F | 126 | 48.1°F |
| Hamilton County | 51.5°F | 4.7°F | 127 | 46.9°F |
| Hancock County | 49.9°F | 4.6°F | 126 | 45.3°F |
| Hardin County | 51.1°F | 4.5°F | 127 | 46.7°F |
| Harrison County | 53.3°F | 4.4°F | 128 | 48.9°F |
| Henry County | 54.9°F | 4.8°F | 128 | 50.1°F |
| Howard County | 48.3°F | 4.5°F | 126 | 43.8°F |
| Humboldt County | 51.3°F | 4.8°F | 127 | 46.5°F |
| Ida County | 51.1°F | 4.4°F | 126 | 46.7°F |
| Iowa County | 53.3°F | 5.1°F | 129 | 48.3°F |
| Jackson County | 52.2°F | 4.8°F | 128 | 47.4°F |
| Jasper County | 53.0°F | 4.4°F | 127 | 48.6°F |
| Jefferson County | 54.5°F | 4.7°F | 128 | 49.9°F |
| Johnson County | 53.4°F | 4.9°F | 128 | 48.5°F |
| Jones County | 51.8°F | 4.6°F | 128 | 47.1°F |
| Keokuk County | 53.4°F | 4.4°F | 128 | 49.0°F |
| Kossuth County | 49.5°F | 4.2°F | 125 | 45.3°F |
| Lee County | 55.7°F | 4.6°F | 128 | 51.1°F |
| Linn County | 52.1°F | 4.9°F | 127 | 47.2°F |
| Louisa County | 54.2°F | 4.5°F | 127 | 49.7°F |
| Lucas County | 54.2°F | 4.5°F | 128 | 49.6°F |
| Lyon County | 49.1°F | 3.8°F | 117 | 45.3°F |
| Madison County | 53.3°F | 4.2°F | 127 | 49.1°F |
| Mahaska County | 53.6°F | 4.4°F | 128 | 49.2°F |
| Marion County | 54.3°F | 4.6°F | 128 | 49.7°F |
| Marshall County | 52.3°F | 4.7°F | 128 | 47.6°F |
| Mills County | 54.4°F | 4.2°F | 127 | 50.2°F |
| Mitchell County | 48.7°F | 4.3°F | 124 | 44.5°F |
| Monona County | 52.9°F | 4.7°F | 126 | 48.1°F |
| Monroe County | 54.4°F | 4.5°F | 128 | 49.9°F |
| Montgomery County | 53.4°F | 3.9°F | 125 | 49.6°F |
| Muscatine County | 53.8°F | 4.6°F | 126 | 49.2°F |
| O'Brien County | 49.8°F | 4.3°F | 126 | 45.5°F |
| Osceola County | 48.8°F | 4.1°F | 123 | 44.7°F |
| Page County | 53.9°F | 3.8°F | 124 | 50.1°F |
| Palo Alto County | 49.4°F | 4.0°F | 121 | 45.4°F |
| Plymouth County | 50.4°F | 3.8°F | 118 | 46.6°F |
| Pocahontas County | 50.6°F | 4.2°F | 125 | 46.4°F |
| Polk County | 53.8°F | 4.6°F | 128 | 49.2°F |
| Pottawattamie County | 53.5°F | 4.2°F | 126 | 49.3°F |
| Poweshiek County | 52.6°F | 4.6°F | 128 | 48.1°F |
| Ringgold County | 53.4°F | 4.1°F | 126 | 49.3°F |
| Sac County | 50.7°F | 4.1°F | 126 | 46.6°F |
| Scott County | 53.3°F | 4.8°F | 126 | 48.6°F |
| Shelby County | 52.5°F | 4.5°F | 128 | 48.0°F |
| Sioux County | 49.7°F | 3.7°F | 119 | 46.0°F |
| Story County | 52.4°F | 4.6°F | 127 | 47.8°F |
| Tama County | 52.5°F | 5.1°F | 129 | 47.4°F |
| Taylor County | 52.9°F | 3.5°F | 121 | 49.3°F |
| Union County | 53.2°F | 4.4°F | 128 | 48.8°F |
| Van Buren County | 55.2°F | 4.7°F | 128 | 50.6°F |
| Wapello County | 54.3°F | 4.5°F | 128 | 49.8°F |
| Warren County | 54.4°F | 4.6°F | 128 | 49.8°F |
| Washington County | 53.8°F | 4.7°F | 128 | 49.1°F |
| Wayne County | 54.2°F | 4.5°F | 128 | 49.7°F |
| Webster County | 51.8°F | 4.8°F | 127 | 47.0°F |
| Winnebago County | 49.2°F | 4.6°F | 126 | 44.6°F |
| Winneshiek County | 49.0°F | 4.7°F | 126 | 44.3°F |
| Woodbury County | 51.8°F | 4.4°F | 126 | 47.4°F |
| Worth County | 48.9°F | 4.4°F | 125 | 44.5°F |
| Wright County | 50.8°F | 4.7°F | 127 | 46.1°F |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: County Mapping, published August 2025, retrieved on August 11, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
