Winter temperatures · Iowa
How cold does Sioux City get in winter?
In a typical winter, December to February, Sioux City averages highs around 32°F and lows around 13°F.
About 51 days a year never get above freezing. About 39 nights a year drop to 10°F or colder, and about 16 go below zero. That makes it the 11th coldest winter of the 129 US cities we track.
Last updated
The coldest low in the forecast for the next 48 hours is about 27°F.
Sioux City gets about 39 nights a year at 10°F or colder, and the Missouri River looks visibly unimpressed by all of them.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
More about the weather here
Winter at a glance
| Average winter high | 32°F |
|---|---|
| Average winter low | 13°F |
| Days a year that stay below freezing | 51 |
| Nights a year at 32°F or colder | 154 |
| Nights a year at 10°F or colder | 39 |
| Nights a year below zero | 16 |
| Average summer high, for comparison | 83°F |
Winter here is December to February. Counts are averages a year.
Cities with about the same winter
- Waterloo, Iowa: highs around 32°F, lows around 14°F
- Madison, Wisconsin: highs around 30°F, lows around 15°F
- Dubuque, Iowa: highs around 30°F, lows around 14°F
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00014943.