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Sioux City Weather in December
United States · early winter in Northern Hemisphere / early summer in Southern Hemisphere
Sioux City at the meeting of Iowa, Nebraska, and South Dakota on the Missouri River has a harsh continental climate at the edge of the Great Plains. Cold Arctic air arrives with little warning and blizzards can be intense. The Missouri River valley provides some shelter but also contributes to flooding risk and valley fog.
Holiday season. Many cities decorate beautifully. Book ahead for December travel.
Current Weather in Sioux City Right Now
34°F
Clear Sky
Feels like 27°F · H 35°F / L 33°F