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Weather in Rapid City, South Dakota for December 2025

Your guide to Rapid City weather in December - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Rapid City during December is quite rare, with fewer than 2 snowy days on average.
    According to Rapid City snow forecast for December 2025, no snow is expected until the end of the month.

    • Temperatures

  • Until now, December 2025 in Rapid City has been nearly identical to the historical average, with a temperature of 5.3 °F (showing only a slight deviation of 0.3 °F).

  • The forecast for the next days in Rapid City predicts temperatures to be around 12 °F, close to the historical average.

  • In general, the average temperature in Rapid City at the beginning of December is 6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 11.1 °F by the end of December.

    • Rain 🌧️

  • With an average of 4 rainy days, Rapid City experiences minimal rainfall in December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
1
Snow days
Average temperatures
5°/-3°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Rapid City Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
4°
2
Overcast
1°
3
Sunny
7°
4
Cloudy
6°
5
Sunny
5°
6
Cloudy
8°
7
Sunny
11°
8
Patchy rain possible
8°
9
Light freezing rain
5°
10
Light freezing rain
1°
11
Light freezing rain
3°
12
Overcast
-1°
13
Overcast
-2°
14
Partly cloudy
8°
15
Light freezing rain
8°
16
Overcast
7°
17
Overcast
5°
18
Partly cloudy
2°
19
Sunny
8°
20
Overcast
3°
21
Partly cloudy
7°
22
Sunny
15°
23
Mist
6°
24
Partly cloudy
16°
25
Sunny
13°
26
Sunny
10°
27
Sunny
14°
28
Partly cloudy
11°
29
Partly cloudy
5°
30
Sunny
12°
31
Cloudy
13°

Temperatures trend during December in Rapid City

See the weather trend as well as the moving average line

December weather in Rapid City day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Sunny
Sunny
 4° /-8° 0 mm 3
Dec. 2 Overcast
Overcast
 1° /-7° 0 mm 1
Dec. 3 Sunny
Sunny
 7° /-6° 0 mm 3
Dec. 4 Cloudy
Cloudy
 6° /-5° 0 mm 2
Dec. 5 Sunny
Sunny
 5° /-3° 0 mm 2
Dec. 6 Cloudy
Cloudy
 8° /-1° 0 mm 2
Dec. 7 Sunny
Sunny
 11° /-1° 0 mm 4
Dec. 8 Patchy rain possible
Patchy rain possible
 8° /1° 0.1 mm 2
Dec. 9 Light freezing rain
Light freezing rain
 5° /-1° 0.6 mm 2
Dec. 10 Light freezing rain
Light freezing rain
 1° /-3° 1.2 mm 1
Dec. 11 Light freezing rain
Light freezing rain
 3° /-3° 1.4 mm 2
Dec. 12 Overcast
Overcast
 -1° /-6° 0 mm 1
Dec. 13 Overcast
Overcast
 -2° /-10° 0 mm 1
Dec. 14 Partly cloudy
Partly cloudy
 8° /-8° 0 mm 3
Dec. 15 Light freezing rain
Light freezing rain
 8° /1° 0.5 mm 3
Dec. 16 Overcast
Overcast
 7° /0° 0 mm 2
Dec. 17 Overcast
Overcast
 5° /-2° 0.3 mm 2
Dec. 18 Partly cloudy
Partly cloudy
 2° /-5° 0 mm 2
Dec. 19 Sunny
Sunny
 8° /-5° 0 mm 3
Dec. 20 Overcast
Overcast
 3° /-7° 0 mm 1
Dec. 21 Partly cloudy
Partly cloudy
 7° /-5° 0 mm 0.2
Dec. 22 Sunny
Sunny
 15° /4° 0 mm 0.2
Dec. 23 Mist
Mist
 6° /-1° 0 mm 0.2
Dec. 24 Partly cloudy
Partly cloudy
 16° /8° 0 mm 0.3
Dec. 25 Sunny
Sunny
 13° /-4° 0 mm 0
Dec. 26 Sunny
Sunny
 10° /-7° 0 mm 2
Dec. 27 Sunny
Sunny
 14° /2° 0 mm 3
Dec. 28 Partly cloudy
Partly cloudy
 11° /7° 0 mm 3
Dec. 29 Partly cloudy
Partly cloudy
 5° /0° 0.1 mm 2
Dec. 30 Sunny
Sunny
 12° /-1° 0 mm 2
Dec. 31 Cloudy
Cloudy
 13° /2° 0 mm 2
Next
Important Notice
Our weather forecast for Rapid City 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 Rapid City forecast closer to your planned date for the most up-to-date weather information.
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Rapid City in December - FAQ

What are the expected maximum and minimum temperatures in Rapid City 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 Rapid City during December?
Expect minimal rainfall in Rapid City during December, with a total of 18.3 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
Will it snow in Rapid City in December 2025?
Rapid City typically sees 0.94 cm of snowfall during December.
What are the typical wind conditions in Rapid City during December?
The average wind speed in Rapid City during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Rapid City

Explore the daily rainfall trends and prepare for Rapid Citys December weather 💧
Typically, Rapid City has 4 rainy days in December with a total of 18.3 mm of rainfall.

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Location coordinates Where is Rapid City?

Get accurate weather forecasts for Rapid City, located at latitude 44.081 and longitude -103.231. Stay updated with localized weather information tailored for Rapid City.

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