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Weather in Rapid City, South Dakota for December 2026

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.

    • Temperatures

  • In general, the average temperature in Rapid City 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.

    • Rain 🌧️

  • With an average of 2 rainy days, Rapid City experiences minimal rainfall in December.

    • More

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

Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
1
Snow days
Average temperatures
6°/-3°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Rapid City Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
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
4°
21
Sunny
10°
22
Overcast
12°
23
Partly cloudy
9°
24
Partly cloudy
8°
25
Overcast
8°
26
Sunny
11°
27
Overcast
8°
28
Overcast
2°
29
Partly cloudy
4°
30
Moderate snow
4°
31
Overcast
6°

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 Snow More
Dec. 1 Sunny
Sunny
 4° /-8° 0 mm 0 cm
Dec. 2 Overcast
Overcast
 1° /-7° 0 mm 0 cm
Dec. 3 Sunny
Sunny
 7° /-6° 0 mm 0 cm
Dec. 4 Cloudy
Cloudy
 6° /-5° 0 mm 0 cm
Dec. 5 Sunny
Sunny
 5° /-3° 0 mm 0 cm
Dec. 6 Cloudy
Cloudy
 8° /-1° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 11° /-1° 0 mm 0 cm
Dec. 8 Patchy rain possible
Patchy rain possible
 8° /1° 0.1 mm 0 cm
Dec. 9 Light freezing rain
Light freezing rain
 5° /-1° 0.6 mm 0 cm
Dec. 10 Light freezing rain
Light freezing rain
 1° /-3° 1.2 mm 0 cm
Dec. 11 Light freezing rain
Light freezing rain
 3° /-3° 1.4 mm 0 cm
Dec. 12 Overcast
Overcast
 -1° /-6° 0 mm 0 cm
Dec. 13 Overcast
Overcast
 -2° /-10° 0 mm 0 cm
Dec. 14 Partly cloudy
Partly cloudy
 8° /-8° 0 mm 0 cm
Dec. 15 Light freezing rain
Light freezing rain
 8° /1° 0.5 mm 0 cm
Dec. 16 Overcast
Overcast
 7° /0° 0 mm 0 cm
Dec. 17 Overcast
Overcast
 5° /-2° 0.3 mm 0 cm
Dec. 18 Partly cloudy
Partly cloudy
 2° /-5° 0 mm 0 cm
Dec. 19 Sunny
Sunny
 8° /-5° 0 mm 0 cm
Dec. 20 Overcast
Overcast
 4° /-4° 0 mm 0 cm
Dec. 21 Sunny
Sunny
 10° /-1° 0 mm 0 cm
Dec. 22 Overcast
Overcast
 12° /2° 0 mm 0 cm
Dec. 23 Partly cloudy
Partly cloudy
 9° /0° 0 mm 0 cm
Dec. 24 Partly cloudy
Partly cloudy
 8° /0° 0 mm 0 cm
Dec. 25 Overcast
Overcast
 8° /0° 0 mm 0 cm
Dec. 26 Sunny
Sunny
 11° /2° 0 mm 0 cm
Dec. 27 Overcast
Overcast
 8° /-1° 0 mm 0 cm
Dec. 28 Overcast
Overcast
 2° /-5° 0 mm 0 cm
Dec. 29 Partly cloudy
Partly cloudy
 4° /-6° 0.1 mm 0 cm
Dec. 30 Moderate snow
Moderate snow
 4° /-2° 5.1 mm 0.5 cm
Dec. 31 Overcast
Overcast
 6° /-4° 0 mm 0 cm
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?

Prepare for cooler days with highs just around 6° and colder nights, dipping below -3°.

How much rainfall should be expected in Rapid City during December?

Rainfall in Rapid City 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 Rapid City in December 2026?

Rapid City typically sees 0.47 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 26 km/h, suggesting breezy to windy conditions, depending on your activities.

Rapid City snow forecast December 2026

Track daily snowfall levels and discover Rapid City’s snowy potential this December ❄️
On average, Rapid City sees 1 snowy days during December, with approximately 0.5 cm of total snowfall.

December rainfall patterns in Rapid City

Explore the daily rainfall trends and prepare for Rapid Citys December weather 💧
Typically, Rapid City has 2 rainy days in December with a total of 9.2 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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