Sioux City (IA)
December
Weather in Sioux City, Iowa for December 2026
Your guide to Sioux City weather in December - trends and predictions
With an average of 3 snowy days, Sioux City usually enjoys a light touch of snow in December.
In general, the average temperature in Sioux City at the beginning of December is 0.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 3 °F by the end of December.
Sioux City experiences moderate rainfall in December, with an average of 6 rainy days and a total precipitation of 37.7 mm.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
More
22
Dry days
6
Rainy days
3
Snow days
2°/-5°
Temperatures
22 km/h
Avg max wind
72 %
Avg humidity
Sioux City Weather December
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Temperatures trend during December in Sioux City
See the weather trend as well as the moving average line
December weather in Sioux City day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Light freezing rain | -2° /-9° | 0.2 mm | 0 cm | |
| Dec. 2 |  Overcast | -2° /-10° | 0 mm | 0 cm | |
| Dec. 3 |  Sunny | 1° /-9° | 0 mm | 0 cm | |
| Dec. 4 |  Partly cloudy | 1° /-12° | 0 mm | 0 cm | |
| Dec. 5 | Overcast | -1° /-9° | 0 mm | 0 cm | |
| Dec. 6 | Overcast | 2° /-4° | 12.2 mm | 8.8 cm | |
| Dec. 7 | Partly cloudy | 4° /-7° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 5° /-5° | 0 mm | 0 cm | |
| Dec. 9 | Overcast | 4° /-2° | 0 mm | 0 cm | |
| Dec. 10 | Light freezing rain | 2° /-4° | 0.2 mm | 0 cm | |
| Dec. 11 | Partly cloudy | 0° /-8° | 0 mm | 0 cm | |
| Dec. 12 | Light freezing rain | -4° /-9° | 0.4 mm | 0 cm | |
| Dec. 13 | Light freezing rain | -5° /-13° | 10.9 mm | 7.6 cm | |
| Dec. 14 |  Moderate snow | -3° /-11° | 1.3 mm | 0.6 cm | |
| Dec. 15 | Overcast | 4° /-6° | 0 mm | 0 cm | |
| Dec. 16 |  Cloudy | 6° /-6° | 0.1 mm | 0 cm | |
| Dec. 17 | Overcast | 3° /-2° | 0.2 mm | 0 cm | |
| Dec. 18 | Partly cloudy | 2° /-6° | 1.6 mm | 0 cm | |
| Dec. 19 | Overcast | 3° /-8° | 0 mm | 0 cm | |
| Dec. 20 | Partly cloudy | -1° /-6° | 0 mm | 0 cm | |
| Dec. 21 | Partly cloudy | 1° /-7° | 0 mm | 0 cm | |
| Dec. 22 | Cloudy | 7° /-3° | 0 mm | 0 cm | |
| Dec. 23 | Overcast | 2° /-2° | 0 mm | 0 cm | |
| Dec. 24 | Overcast | 1° /-1° | 0 mm | 0 cm | |
| Dec. 25 | Overcast | 0° /-2° | 0 mm | 0 cm | |
| Dec. 26 | Light freezing rain | 3° /0° | 0.1 mm | 0 cm | |
| Dec. 27 |  Patchy rain possible | 4° /1° | 0.4 mm | 0 cm | |
| Dec. 28 | Overcast | 7° /-6° | 5.2 mm | 1.6 cm | |
| Dec. 29 | Overcast | 1° /-6° | 0 mm | 0 cm | |
| Dec. 30 |  Moderate or heavy rain shower | 3° /-6° | 10.4 mm | 5.7 cm | |
| Dec. 31 | Overcast | 3° /-2° | 5 mm | 3.6 cm | |
| Next | |||||
Important Notice
Our weather forecast for Sioux City in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sioux City forecast closer to your planned date for the most up-to-date weather information.
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Sioux City in December - FAQ
What are the expected maximum and minimum temperatures in Sioux City during December?
Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Sioux City during December?
In December, Sioux City can expect light to moderate rainfall, totaling 37.7 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
Will it snow in Sioux City in December 2026?
Sioux City experiences an average snowfall of 19.7 cm during December, occurring over 3 days.
What are the typical wind conditions in Sioux City during December?
The average wind speed in Sioux City during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
Sioux City snow forecast December 2026
Track daily snowfall levels and discover Sioux City’s snowy potential this December ❄️
On average, Sioux City sees 3 snowy days during December, with approximately 19.7 cm of total snowfall.
December rainfall patterns in Sioux City
Explore the daily rainfall trends and prepare for Sioux Citys December weather 💧
Typically, Sioux City has 6 rainy days in December with a total of 37.7 mm of rainfall.
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