Sioux City weather in January 2026

Expect daytime maximum temperatures of 28°F in Sioux City, Iowa in January based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

  • 28°F maximum daytime temperature in January in Sioux City28
    28°F max day temperature
  • 6 hours of sunshine per day
  • 7 days with some rainfall in January in Sioux City7
    7 days with some rainfall
  • 7°F minimum night-time temperature in January in Sioux City7
    7°F min night temperature
  • 9 hours of daylight per day in January in Sioux City9
    9 hours of daylight per day
  • No heat & humidity in January in Sioux City0
    No heat & humidity
  • 0.6 inches monthly rainfall in January in Sioux City0.6
    0.6 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Sioux City1
    1 (Low) UV index

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The January weather guide for Iowa (Sioux City) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How cold is it in Sioux City in January?

Daytime temperatures usually reach 28°F in Sioux City in January, falling to 7°F at night.

How sunny is it in Sioux City in January?

There are normally 6 hours of bright sunshine each day in Sioux City in January - that's 59% of daylight hours.

Does it rain in Sioux City in January?

There are usually 7 days with some rain in Sioux City in January and the average monthly rainfall is 0.6 inches. Rain may fall as snow in this month.

Sioux City January sunrise & sunset times

Browse the sunrise and sunset times for Sioux City in January 2026. Select a month to view Sioux City sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:55 17:03
Friday, 16th January 2026 07:52 17:19
Saturday, 31st January 2026 07:40 17:38

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