Iowa weather in December: Statewide normals and every place, NOAA 1991-2020
In December, Iowa's statewide normal high is 33°F and normal low 17°F; normal highs run from 27°F in Northwood to 38°F in Keokuk (NOAA 1991-2020 normals).
- Statewide normal high
- 33°FDecember, 1991-2020
- Statewide normal low
- 17°FDecember, 1991-2020
- Statewide normal precipitation
- 1.37 inDecember
- Warmest place
- 38°Fnormal high, Keokuk
- Coolest place
- 27°Fnormal high, Northwood
Where is Iowa warmest and wettest in December?
Keokuk has the warmest December afternoons (38°F) and Northwood the coolest (27°F). Lowden gets the most precipitation (2.04 in) and Spencer the least (0.42 in). The most snow falls in Dubuque (10.3 inches).
Statewide, December averaged 31.9°F in 2021, 21.3°F in 2022, 34.5°F in 2023, 28.2°F in 2024, 23.6°F in 2025, against a 1991-2020 normal of 25.0°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Des Moines | 36°F | 20°F | 1.58 | 7.9 |
| Cedar Rapids | 33°F | 17°F | 1.59 | – |
| Davenport | 35°F | 20°F | 1.64 | – |
| Sioux City | 33°F | 15°F | 0.99 | 7.6 |
| Ankeny | 35°F | 18°F | 1.39 | 4.5 |
| Iowa City | 36°F | 20°F | 1.45 | – |
| Ames | 34°F | 17°F | 1.05 | – |
| Waterloo | 34°F | 17°F | 1.44 | 9.9 |
| Dubuque | 32°F | 17°F | 1.80 | 10.3 |
| Marion | 35°F | 19°F | 1.67 | 9.0 |
| Marshalltown | 33°F | 16°F | 1.01 | – |
| Mason City | 30°F | 14°F | 1.29 | 9.4 |
| Ottumwa | 37°F | 20°F | 1.44 | 4.2 |
| Fort Dodge | 31°F | 14°F | 1.46 | 7.9 |
| Clinton | 35°F | 21°F | 1.86 | 7.9 |
| Burlington | 37°F | 22°F | 1.87 | – |
| Muscatine | 36°F | 20°F | 2.00 | 6.2 |
| Indianola | 37°F | 17°F | 1.40 | 6.7 |
| Newton | 34°F | 17°F | 1.27 | 6.3 |
| Boone | 34°F | 16°F | 1.57 | 7.9 |
| Storm Lake | 31°F | 15°F | 1.11 | – |
| Oskaloosa | 36°F | 18°F | 1.35 | – |
| Spencer | 31°F | 14°F | 0.42 | – |
| Le Mars | 32°F | 13°F | 1.04 | 6.0 |
| Carroll | 33°F | 16°F | 1.38 | – |
| Fort Madison | 38°F | 23°F | 1.92 | 4.3 |
| Fairfield | 35°F | 20°F | 1.72 | 3.5 |
| Grinnell | 34°F | 16°F | 1.60 | 6.9 |
| Keokuk | 38°F | 23°F | 1.95 | – |
| Sioux Center | 32°F | 15°F | 0.99 | 6.7 |
| Mount Pleasant | 37°F | 18°F | 1.68 | 6.1 |
| Denison | 32°F | 16°F | 1.20 | 7.9 |
| Perry | 35°F | 17°F | 1.38 | – |
| Webster City | 32°F | 13°F | 1.36 | 8.1 |
| Decorah | 33°F | 17°F | 1.31 | 9.1 |
| Knoxville | 36°F | 19°F | 1.57 | – |
| Creston | 36°F | 16°F | 1.48 | – |
| Washington | 36°F | 18°F | 1.71 | 4.7 |
| Charles City | 30°F | 15°F | 1.38 | 8.0 |
| Atlantic | 36°F | 15°F | 1.50 | 7.7 |
| Independence | 32°F | 15°F | 1.66 | 7.6 |
| Maquoketa | 33°F | 18°F | 1.78 | 7.1 |
| Anamosa | 33°F | 16°F | 1.84 | – |
| Estherville | 28°F | 12°F | 0.54 | – |
| Oelwein | 31°F | 15°F | – | – |
| Osceola | 37°F | 17°F | 1.54 | 5.7 |
| Sheldon | 30°F | 11°F | 1.17 | 9.6 |
| Spirit Lake | 29°F | 13°F | 0.82 | 8.0 |
| Winterset | 35°F | 16°F | 1.23 | 5.9 |
| Red Oak | 37°F | 18°F | 1.38 | 6.5 |
| Centerville | 38°F | 18°F | 1.46 | 2.3 |
| Algona | 31°F | 13°F | 1.06 | – |
| Clarinda | 38°F | 17°F | 1.38 | 4.3 |
| Manchester | 32°F | 15°F | 1.58 | 8.5 |
| Glenwood | 38°F | 18°F | 1.16 | 3.4 |
| Cherokee | 32°F | 13°F | 0.93 | 9.4 |
| Iowa Falls | 32°F | 15°F | 1.54 | 6.1 |
| Vinton | 31°F | 15°F | 1.59 | 8.8 |
| Harlan | 36°F | 16°F | 1.31 | 6.7 |
| Shenandoah | 38°F | 19°F | 1.40 | 5.8 |
| Le Claire | 36°F | 21°F | 1.89 | – |
| Humboldt | 30°F | 15°F | 1.32 | – |
| Hampton | 31°F | 15°F | 1.59 | – |
| Chariton | 37°F | 16°F | 1.27 | 3.1 |
| Forest City | 29°F | 13°F | 1.23 | – |
| Jefferson | 33°F | 16°F | 1.38 | 7.5 |
| Cresco | 30°F | 13°F | 1.42 | 9.5 |
| Waukon | 29°F | 15°F | 1.57 | – |
| Emmetsburg | 32°F | 14°F | 1.06 | 7.1 |
| Albia | 37°F | 19°F | 1.47 | 6.9 |
| Osage | 29°F | 14°F | 1.51 | 9.6 |
| New Hampton | 29°F | 12°F | 1.67 | 7.9 |
| Williamsburg | 34°F | 16°F | 1.69 | 6.3 |
| Milford | 29°F | 13°F | 0.84 | 8.6 |
| Tipton | 34°F | 19°F | 1.55 | – |
| Grundy Center | 32°F | 15°F | 1.44 | 9.5 |
| Onawa | 34°F | 14°F | 0.69 | 7.1 |
| Sibley | 28°F | 11°F | 1.05 | 9.1 |
| Bloomfield | 37°F | 21°F | 1.51 | 5.1 |
| Clarion | 31°F | 13°F | 1.22 | 5.9 |
| Rock Rapids | 30°F | 12°F | 0.82 | 8.4 |
| Hawarden | 31°F | 13°F | 1.27 | 7.3 |
| Eldora | 32°F | 15°F | 1.62 | 8.4 |
| Postville | 31°F | 14°F | 1.57 | 8.0 |
| Cascade | 33°F | 18°F | 1.75 | 6.9 |
| Toledo | 33°F | 16°F | 1.20 | 8.6 |
| Belle Plaine | 34°F | 17°F | 1.58 | 6.3 |
| Bellevue | 34°F | 19°F | 1.93 | 8.4 |
| Rockwell City | 32°F | 15°F | 1.34 | 7.3 |
| Lamoni | 38°F | 21°F | 1.48 | – |
| Northwood | 27°F | 11°F | 1.28 | 7.6 |
| Audubon | 33°F | 14°F | 1.18 | – |
| Britt | 30°F | 13°F | 1.13 | – |
| Sac City | 32°F | 14°F | 1.17 | 7.2 |
| Greenfield | 34°F | 17°F | 1.48 | 5.4 |
| Ida Grove | 32°F | 15°F | – | – |
| Sigourney | 35°F | 18°F | 1.54 | – |
| Pocahontas | 31°F | 14°F | 1.22 | 10.3 |
| Guttenberg | 33°F | 18°F | 1.66 | 9.2 |
| Columbus Junction | 35°F | 17°F | 1.94 | 6.3 |
| Leon | 38°F | 18°F | 1.35 | 7.8 |
| Mount Ayr | 37°F | 18°F | 1.63 | 4.0 |
| Guthrie Center | 35°F | 16°F | 1.41 | – |
| Oakland | 35°F | 17°F | 1.31 | 6.5 |
| Corning | 36°F | 18°F | 1.43 | 6.9 |
| Holstein | 31°F | 14°F | 1.18 | 8.1 |
| Bedford | 37°F | 18°F | 1.59 | – |
| Sanborn | 29°F | 12°F | 1.17 | 9.5 |
| Logan | 35°F | 15°F | 1.40 | 6.6 |
| Tripoli | 31°F | 15°F | 1.47 | – |
| Fayette | 31°F | 13°F | 1.65 | 10.2 |
| Elkader | 32°F | 14°F | 1.57 | 8.1 |
| Lake Park | 29°F | 12°F | 0.98 | 9.2 |
| Mapleton | 33°F | 14°F | 1.13 | 7.1 |
| Sidney | 37°F | 19°F | 1.21 | 4.2 |
| Keosauqua | 37°F | 20°F | 1.96 | 5.5 |
| Allison | 31°F | 15°F | 1.35 | – |
| Primghar | 31°F | 15°F | 1.02 | 8.2 |
| Donnellson | 38°F | 21°F | 1.96 | 6.4 |
| Colo | 32°F | 16°F | 1.54 | 6.8 |
| Lowden | 34°F | 18°F | 2.04 | 9.1 |
| Dakota City | 31°F | 15°F | 1.37 | – |
| Sioux Rapids | 30°F | 14°F | 0.94 | 6.7 |
| Coggon | 32°F | 16°F | 1.56 | – |
| Battle Creek | 33°F | 13°F | 1.12 | – |
| Swea City | 28°F | 11°F | 1.17 | 8.3 |
| Allerton | 37°F | 19°F | 1.62 | – |
| Little Sioux | 34°F | 14°F | 1.50 | 9.8 |
| Castana | 33°F | 16°F | 1.03 | 5.7 |
| Stanley | 31°F | 14°F | 1.59 | – |
| Rathbun | 37°F | 19°F | 1.46 | – |
| Beaconsfield | 36°F | 18°F | 1.49 | 6.0 |
| Des Moines Weather Office-Johnston | 35°F | 19°F | 1.46 | 8.3 |
| Sioux City Ang | 34°F | 14°F | 0.97 | – |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.