Rapid City (SD)
January
Weather in Rapid City, South Dakota for January 2026
Your guide to Rapid City weather in January - trends and predictions
In general, the average temperature in Rapid City at the beginning of January is -5.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 5.7 °F by the end of January.
The climate of Rapid City in January is notably wet, with an average of 12 rainy days, and a total of 14.5 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
12
Rainy days
0
Snow days
-1°/-9°
Temperatures
23 km/h
Avg max wind
69 %
Avg humidity
Rapid City Weather January
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Temperatures trend during January in Rapid City
See the weather trend as well as the moving average line
January weather in Rapid City day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 |  Cloudy | 0° /-8° | 0 mm | 1 | |
| Jan. 2 | Cloudy | -2° /-7° | 0 mm | 1 | |
| Jan. 3 |  Light freezing rain | -5° /-8° | 2.5 mm | 1 | |
| Jan. 4 | Light freezing rain | -9° /-13° | 3.3 mm | 1 | |
| Jan. 5 | Light freezing rain | -10° /-15° | 1.3 mm | 1 | |
| Jan. 6 |  Overcast | -5° /-13° | 0.3 mm | 1 | |
| Jan. 7 | Light freezing rain | -8° /-15° | 0.2 mm | 1 | |
| Jan. 8 |  Partly cloudy | 4° /-11° | 0.9 mm | 2 | |
| Jan. 9 | Overcast | 1° /-3° | 1.3 mm | 1 | |
| Jan. 10 | Cloudy | 2° /-6° | 0 mm | 1 | |
| Jan. 11 | Light freezing rain | 2° /-1° | 1.5 mm | 1 | |
| Jan. 12 | Overcast | -2° /-12° | 0.2 mm | 1 | |
| Jan. 13 | Cloudy | -2° /-14° | 0.1 mm | 1 | |
| Jan. 14 | Light freezing rain | 0° /-6° | 1.1 mm | 1 | |
| Jan. 15 | Cloudy | 5° /-6° | 0 mm | 2 | |
| Jan. 16 |  Sunny | 10° /0° | 0 mm | 4 | |
| Jan. 17 | Light freezing rain | 3° /-7° | 0.3 mm | 1 | |
| Jan. 18 | Light freezing rain | -9° /-17° | 0.3 mm | 1 | |
| Jan. 19 | Sunny | -13° /-22° | 0 mm | 2 | |
| Jan. 20 | Sunny | -16° /-21° | 0 mm | 2 | |
| Jan. 21 | Cloudy | 1° /-20° | 0 mm | 1 | |
| Jan. 22 | Light freezing rain | -3° /-6° | 0.6 mm | 1 | |
| Jan. 23 | Partly cloudy | -2° /-9° | 0.6 mm | 2 | |
| Jan. 24 | Overcast | 0° /-6° | 0 mm | 1 | |
| Jan. 25 | Sunny | -4° /-12° | 0 mm | 2 | |
| Jan. 26 | Sunny | 0° /-15° | 0 mm | 2 | |
| Jan. 27 | Sunny | 7° /-6° | 0 mm | 3 | |
| Jan. 28 | Sunny | 9° /-1° | 0 mm | 3 | |
| Jan. 29 | Sunny | 12° /-1° | 0 mm | 4 | |
| Jan. 30 | Sunny | 9° /0° | 0 mm | 3 | |
| Jan. 31 | Overcast | 7° /0° | 0 mm | 2 | |
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Important Notice
Our weather forecast for Rapid City in January 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 January - FAQ
What are the expected maximum and minimum temperatures in Rapid City during January?
Brace for cold days with temperatures not exceeding -1° 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 January?
Expect minimal rainfall in Rapid City during January, with a total of 14.5 mm over approximately 12 days. This minimal precipitation is unlikely to significantly impact plans.
Will it snow in Rapid City in January 2026?
Rapid City typically sees 0 cm of snowfall during January.
What are the typical wind conditions in Rapid City during January?
The average wind speed in Rapid City during January is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in Rapid City
Explore the daily rainfall trends and prepare for Rapid Citys January weather 💧
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