Sioux Falls weather in January 2026

Expect daytime maximum temperatures of 25°F in Sioux Falls, South Dakota in January based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

  • 25°F maximum daytime temperature in January in Sioux Falls25
    25°F max day temperature
  • 6 hours of sunshine per day
  • 7 days with some rainfall in January in Sioux Falls7
    7 days with some rainfall
  • 3°F minimum night-time temperature in January in Sioux Falls3
    3°F min night temperature
  • 9 hours of daylight per day in January in Sioux Falls9
    9 hours of daylight per day
  • No heat & humidity in January in Sioux Falls0
    No heat & humidity
  • 0.5 inches monthly rainfall in January in Sioux Falls0.5
    0.5 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Sioux Falls1
    1 (Low) UV index

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The January weather guide for South Dakota (Sioux Falls) 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 Falls in January?

Daytime temperatures usually reach 25°F in Sioux Falls in January, falling to 3°F at night.

How sunny is it in Sioux Falls in January?

There are normally 6 hours of bright sunshine each day in Sioux Falls in January - that's 60% of daylight hours.

Does it rain in Sioux Falls in January?

There are usually 7 days with some rain in Sioux Falls in January and the average monthly rainfall is 0.5 inches. Rain may fall as snow in this month.

Sioux Falls January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 08:00 17:01
Friday, 16th January 2026 07:56 17:17
Saturday, 31st January 2026 07:44 17:37

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