South Dakota (Rapid City)
December
Weather in South Dakota for December 2026
Your guide to South Dakota weather in December - trends and predictions
Snowfall in South Dakota during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in South Dakota at the beginning of December is 6 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 6.1 °C by the end of December.
With an average of 2 rainy days, South Dakota experiences minimal rainfall in December.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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28
Dry days
2
Rainy days
1
Snow days
6°/-3°
Temperatures
26 km/h
Avg max wind
65 %
Avg humidity
South Dakota Weather December
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What’s the Weather Like in South Dakota This December?
Discover the average temperatures and weather trends across South Dakota’s cities this December.
Temperatures trend during December in South Dakota
See the weather trend as well as the moving average line
December weather in South Dakota day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Sunny | 4° /-8° | 0 mm | 0 cm | |
| Dec. 2 |  Overcast | 1° /-7° | 0 mm | 0 cm | |
| Dec. 3 | Sunny | 7° /-6° | 0 mm | 0 cm | |
| Dec. 4 |  Cloudy | 6° /-5° | 0 mm | 0 cm | |
| Dec. 5 | Sunny | 5° /-3° | 0 mm | 0 cm | |
| Dec. 6 | Cloudy | 8° /-1° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 11° /-1° | 0 mm | 0 cm | |
| Dec. 8 |  Patchy rain possible | 8° /1° | 0.1 mm | 0 cm | |
| Dec. 9 |  Light freezing rain | 5° /-1° | 0.6 mm | 0 cm | |
| Dec. 10 | Light freezing rain | 1° /-3° | 1.2 mm | 0 cm | |
| Dec. 11 | Light freezing rain | 3° /-3° | 1.4 mm | 0 cm | |
| Dec. 12 | Overcast | -1° /-6° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | -2° /-10° | 0 mm | 0 cm | |
| Dec. 14 |  Partly cloudy | 8° /-8° | 0 mm | 0 cm | |
| Dec. 15 | Light freezing rain | 8° /1° | 0.5 mm | 0 cm | |
| Dec. 16 | Overcast | 7° /0° | 0 mm | 0 cm | |
| Dec. 17 | Overcast | 5° /-2° | 0.3 mm | 0 cm | |
| Dec. 18 | Partly cloudy | 2° /-5° | 0 mm | 0 cm | |
| Dec. 19 | Sunny | 8° /-5° | 0 mm | 0 cm | |
| Dec. 20 | Overcast | 4° /-4° | 0 mm | 0 cm | |
| Dec. 21 | Sunny | 10° /-1° | 0 mm | 0 cm | |
| Dec. 22 | Overcast | 12° /2° | 0 mm | 0 cm | |
| Dec. 23 | Partly cloudy | 9° /0° | 0 mm | 0 cm | |
| Dec. 24 | Partly cloudy | 8° /0° | 0 mm | 0 cm | |
| Dec. 25 | Overcast | 8° /0° | 0 mm | 0 cm | |
| Dec. 26 | Sunny | 11° /2° | 0 mm | 0 cm | |
| Dec. 27 | Overcast | 8° /-1° | 0 mm | 0 cm | |
| Dec. 28 | Overcast | 2° /-5° | 0 mm | 0 cm | |
| Dec. 29 | Partly cloudy | 4° /-6° | 0.1 mm | 0 cm | |
| Dec. 30 |  Moderate snow | 4° /-2° | 5.1 mm | 0.5 cm | |
| Dec. 31 | Overcast | 6° /-4° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for South Dakota 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 South Dakota forecast closer to your planned date for the most up-to-date weather information.
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South Dakota in December - FAQ
What are the expected maximum and minimum temperatures in South Dakota during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below -3°.
How much rainfall should be expected in South Dakota during December?
Rainfall in South Dakota during December is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
Will it snow in South Dakota in December 2026?
South Dakota typically sees 0.5 cm of snowfall during December.
What are the typical wind conditions in South Dakota during December?
The average wind speed in South Dakota during December is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
South Dakota snow forecast December 2026
Track daily snowfall levels and discover South Dakota’s snowy potential this December ❄️
On average, South Dakota sees 1 snowy days during December, with approximately 0.5 cm of total snowfall.
December rainfall patterns in South Dakota
Explore the daily rainfall trends and prepare for South Dakotas December weather 💧
Typically, South Dakota has 2 rainy days in December with a total of 9.2 mm of rainfall.
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