Sioux Falls weather in December 2025

Expect daytime maximum temperatures of 28°F in Sioux Falls, South Dakota in December based on long-term weather averages. There are 4 hours of sunshine per day on average, which might fall as snow.

  • 28°F maximum daytime temperature in December in Sioux Falls28
    28°F max day temperature
  • 4 hours of sunshine per day
  • 6 days with some rainfall in December in Sioux Falls6
    6 days with some rainfall
  • 9°F minimum night-time temperature in December in Sioux Falls9
    9°F min night temperature
  • 9 hours of daylight per day in December in Sioux Falls9
    9 hours of daylight per day
  • No heat & humidity in December in Sioux Falls0
    No heat & humidity
  • 0.7 inches monthly rainfall in December in Sioux Falls0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Sioux Falls1
    1 (Low) UV index

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The December 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 December?

Daytime temperatures usually reach 28°F in Sioux Falls in December, falling to 9°F at night.

How sunny is it in Sioux Falls in December?

There are normally 4 hours of bright sunshine each day in Sioux Falls in December - that's 49% of daylight hours.

Does it rain in Sioux Falls in December?

There are usually 6 days with some rain in Sioux Falls in December and the average monthly rainfall is 0.7 inches. Rain may fall as snow in this month.

Sioux Falls December sunrise & sunset times

Browse the sunrise and sunset times for Sioux Falls in December 2025. Select a month to view Sioux Falls sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:41 16:51
Tuesday, 16th December 2025 07:54 16:51
Wednesday, 31st December 2025 08:00 17:00

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