NOAA's National Centers for Environmental Information
County Mapping
County Average Temperature
March - May 1929
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 | 48.9°F | 0.6°F | 76 | 48.3°F |
| Adams County | 49.7°F | 0.8°F | 79 | 48.9°F |
| Allamakee County | 45.8°F | 0.5°F | 72 | 45.3°F |
| Appanoose County | 51.3°F | 1.3°F | 90 | 50.0°F |
| Audubon County | 47.8°F | 0.3°F | 70 | 47.5°F |
| Benton County | 48.7°F | 1.3°F | 92 | 47.4°F |
| Black Hawk County | 47.7°F | 0.9°F | 85 | 46.7°F |
| Boone County | 48.5°F | 0.6°F | 75 | 47.9°F |
| Bremer County | 46.5°F | 0.7°F | 78 | 45.8°F |
| Buchanan County | 47.1°F | 0.8°F | 79 | 46.3°F |
| Buena Vista County | 46.3°F | 0.3°F | 71 | 46.0°F |
| Butler County | 46.7°F | 0.6°F | 75 | 46.1°F |
| Calhoun County | 47.5°F | 0.5°F | 74 | 47.0°F |
| Carroll County | 47.6°F | 0.5°F | 72 | 47.2°F |
| Cass County | 48.9°F | 0.3°F | 65 | 48.6°F |
| Cedar County | 49.6°F | 1.4°F | 90 | 48.2°F |
| Cerro Gordo County | 45.2°F | 0.1°F | 64 | 45.1°F |
| Cherokee County | 46.4°F | 0.3°F | 68 | 46.1°F |
| Chickasaw County | 45.2°F | 0.3°F | 68 | 44.9°F |
| Clarke County | 50.1°F | 0.7°F | 78 | 49.4°F |
| Clay County | 45.8°F | 0.6°F | 72 | 45.3°F |
| Clayton County | 46.6°F | 0.7°F | 77 | 46.0°F |
| Clinton County | 49.9°F | 1.8°F | 96 | 48.1°F |
| Crawford County | 47.7°F | 0.4°F | 72 | 47.3°F |
| Dallas County | 49.2°F | 0.3°F | 73 | 48.9°F |
| Davis County | 51.6°F | 1.5°F | 92 | 50.2°F |
| Decatur County | 50.6°F | 0.8°F | 80 | 49.8°F |
| Delaware County | 47.0°F | 1.0°F | 80 | 46.0°F |
| Des Moines County | 51.7°F | 1.5°F | 96 | 50.2°F |
| Dickinson County | 45.0°F | 0.4°F | 73 | 44.6°F |
| Dubuque County | 47.9°F | 1.4°F | 91 | 46.4°F |
| Emmet County | 45.0°F | 0.4°F | 72 | 44.6°F |
| Fayette County | 45.8°F | 0.5°F | 75 | 45.3°F |
| Floyd County | 45.6°F | 0.2°F | 66 | 45.4°F |
| Franklin County | 45.9°F | 0.2°F | 63 | 45.7°F |
| Fremont County | 51.9°F | 1.1°F | 86 | 50.8°F |
| Greene County | 48.3°F | 0.5°F | 74 | 47.8°F |
| Grundy County | 47.6°F | 0.8°F | 81 | 46.8°F |
| Guthrie County | 48.4°F | 0.3°F | 70 | 48.1°F |
| Hamilton County | 47.2°F | 0.4°F | 70 | 46.9°F |
| Hancock County | 45.8°F | 0.6°F | 76 | 45.3°F |
| Hardin County | 47.0°F | 0.3°F | 68 | 46.7°F |
| Harrison County | 49.1°F | 0.2°F | 68 | 48.9°F |
| Henry County | 51.7°F | 1.5°F | 99 | 50.1°F |
| Howard County | 43.9°F | 0.1°F | 64 | 43.8°F |
| Humboldt County | 47.2°F | 0.7°F | 79 | 46.5°F |
| Ida County | 47.0°F | 0.3°F | 69 | 46.7°F |
| Iowa County | 49.9°F | 1.6°F | 94 | 48.3°F |
| Jackson County | 49.3°F | 2.0°F | 100 | 47.4°F |
| Jasper County | 49.5°F | 0.9°F | 81 | 48.6°F |
| Jefferson County | 51.5°F | 1.7°F | 100 | 49.9°F |
| Johnson County | 50.0°F | 1.5°F | 93 | 48.5°F |
| Jones County | 48.7°F | 1.6°F | 92 | 47.1°F |
| Keokuk County | 50.6°F | 1.7°F | 98 | 49.0°F |
| Kossuth County | 46.1°F | 0.8°F | 81 | 45.3°F |
| Lee County | 52.7°F | 1.6°F | 99 | 51.1°F |
| Linn County | 48.4°F | 1.2°F | 85 | 47.2°F |
| Louisa County | 51.2°F | 1.5°F | 96 | 49.7°F |
| Lucas County | 50.4°F | 0.8°F | 81 | 49.6°F |
| Lyon County | 46.0°F | 0.7°F | 79 | 45.3°F |
| Madison County | 49.5°F | 0.4°F | 73 | 49.1°F |
| Mahaska County | 50.6°F | 1.4°F | 91 | 49.2°F |
| Marion County | 50.8°F | 1.1°F | 87 | 49.7°F |
| Marshall County | 48.4°F | 0.8°F | 80 | 47.6°F |
| Mills County | 51.0°F | 0.8°F | 79 | 50.2°F |
| Mitchell County | 44.6°F | 0.1°F | 63 | 44.5°F |
| Monona County | 48.2°F | 0.0°F | 62 | 48.1°F |
| Monroe County | 51.2°F | 1.3°F | 91 | 49.9°F |
| Montgomery County | 50.2°F | 0.6°F | 74 | 49.6°F |
| Muscatine County | 50.7°F | 1.5°F | 97 | 49.2°F |
| O'Brien County | 46.2°F | 0.7°F | 75 | 45.5°F |
| Osceola County | 45.3°F | 0.6°F | 76 | 44.7°F |
| Page County | 51.1°F | 1.0°F | 79 | 50.1°F |
| Palo Alto County | 46.1°F | 0.6°F | 76 | 45.4°F |
| Plymouth County | 47.4°F | 0.8°F | 78 | 46.6°F |
| Pocahontas County | 46.9°F | 0.5°F | 75 | 46.4°F |
| Polk County | 49.8°F | 0.6°F | 76 | 49.2°F |
| Pottawattamie County | 49.7°F | 0.4°F | 72 | 49.3°F |
| Poweshiek County | 49.3°F | 1.3°F | 89 | 48.1°F |
| Ringgold County | 50.3°F | 1.0°F | 79 | 49.3°F |
| Sac County | 47.0°F | 0.4°F | 72 | 46.6°F |
| Scott County | 50.3°F | 1.7°F | 94 | 48.6°F |
| Shelby County | 48.3°F | 0.3°F | 69 | 48.0°F |
| Sioux County | 46.8°F | 0.8°F | 81 | 46.0°F |
| Story County | 48.3°F | 0.5°F | 73 | 47.8°F |
| Tama County | 48.7°F | 1.3°F | 92 | 47.4°F |
| Taylor County | 50.3°F | 1.0°F | 80 | 49.3°F |
| Union County | 49.7°F | 0.9°F | 78 | 48.8°F |
| Van Buren County | 52.2°F | 1.6°F | 99 | 50.6°F |
| Wapello County | 51.4°F | 1.6°F | 96 | 49.8°F |
| Warren County | 50.5°F | 0.7°F | 80 | 49.8°F |
| Washington County | 50.6°F | 1.5°F | 96 | 49.1°F |
| Wayne County | 50.8°F | 1.0°F | 86 | 49.7°F |
| Webster County | 47.5°F | 0.5°F | 74 | 47.0°F |
| Winnebago County | 45.1°F | 0.5°F | 73 | 44.6°F |
| Winneshiek County | 44.4°F | 0.1°F | 61 | 44.3°F |
| Woodbury County | 47.6°F | 0.2°F | 64 | 47.4°F |
| Worth County | 44.8°F | 0.3°F | 70 | 44.5°F |
| Wright County | 46.5°F | 0.4°F | 72 | 46.1°F |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: County Mapping, published July 2025, retrieved on July 24, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
