Pennington County (Rapid City)
December
Weather in Pennington County, South Dakota for December 2025
Your guide to Pennington County weather in December - trends and predictions
Snowfall in Pennington County during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Pennington County at the beginning of December is 8.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 5 °F by the end of December.
With an average of 5 rainy days, Pennington County experiences minimal rainfall in December.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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25
Dry days
5
Rainy days
1
Snow days
5°/-3°
Temperatures
22 km/h
Avg max wind
66 %
Avg humidity
Pennington County Weather December
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Temperatures trend during December in Pennington County
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December weather in Pennington County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Sunny | 5° /-6° | 0 mm | 0 cm | |
| Dec. 2 |  Overcast | -1° /-9° | 0 mm | 0 cm | |
| Dec. 3 | Sunny | 13° /-3° | 0 mm | 0 cm | |
| Dec. 4 |  Cloudy | 7° /-1° | 0 mm | 0 cm | |
| Dec. 5 | Sunny | 6° /-3° | 0 mm | 0 cm | |
| Dec. 6 | Cloudy | 11° /2° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 16° /3° | 0 mm | 0 cm | |
| Dec. 8 |  Patchy rain possible | 9° /3° | 0.1 mm | 0 cm | |
| Dec. 9 |  Light freezing rain | 0° /-3° | 1.2 mm | 0 cm | |
| Dec. 10 | Light freezing rain | 0° /-5° | 2.4 mm | 0 cm | |
| Dec. 11 | Light freezing rain | -4° /-9° | 2.8 mm | 0 cm | |
| Dec. 12 | Overcast | -4° /-9° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | 0° /-9° | 0 mm | 0 cm | |
| Dec. 14 |  Partly cloudy | 3° /-7° | 0 mm | 0 cm | |
| Dec. 15 | Light freezing rain | 4° /-1° | 1 mm | 0 cm | |
| Dec. 16 | Overcast | 3° /-2° | 0 mm | 0 cm | |
| Dec. 17 | Overcast | 0° /-4° | 0.6 mm | 0 cm | |
| Dec. 18 | Partly cloudy | 3° /-6° | 0 mm | 0 cm | |
| Dec. 19 | Sunny | 6° /-6° | 0 mm | 0 cm | |
| Dec. 20 | Overcast | 3° /-7° | 0 mm | 0 cm | |
| Dec. 21 | Sunny | 11° /1° | 0 mm | 0 cm | |
| Dec. 22 | Overcast | 10° /2° | 0 mm | 0 cm | |
| Dec. 23 | Partly cloudy | 7° /0° | 0 mm | 0 cm | |
| Dec. 24 | Partly cloudy | 9° /0° | 0 mm | 0 cm | |
| Dec. 25 | Overcast | 6° /0° | 0 mm | 0 cm | |
| Dec. 26 | Sunny | 9° /0° | 0 mm | 0 cm | |
| Dec. 27 | Overcast | 6° /-1° | 0 mm | 0 cm | |
| Dec. 28 | Overcast | 7° /-1° | 0 mm | 0 cm | |
| Dec. 29 | Partly cloudy | 6° /0° | 0.1 mm | 0 cm | |
| Dec. 30 |  Moderate snow | 2° /-2° | 10.1 mm | 0.9 cm | |
| Dec. 31 | Overcast | -1° /-7° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Pennington County 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 Pennington County forecast closer to your planned date for the most up-to-date weather information.
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Pennington County in December - FAQ
What are the expected maximum and minimum temperatures in Pennington County during December?
Brace for cold days with temperatures not exceeding 5° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Pennington County during December?
Expect minimal rainfall in Pennington County during December, with a total of 18.3 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
Will it snow in Pennington County in December 2025?
Pennington County typically sees 0.9 cm of snowfall during December.
What are the typical wind conditions in Pennington County during December?
The average wind speed in Pennington County during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
Pennington County snow forecast December 2025
Track daily snowfall levels and discover Pennington County’s snowy potential this December ❄️
December rainfall patterns in Pennington County
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Where is Pennington County?Get accurate weather forecasts for Pennington County, located at latitude 44.081 and longitude -103.231. Stay updated with localized weather information tailored for Pennington County.
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