Typical Weather in Rapid City, SD in January
37° F Avg High
17° F Avg Low
1 Rainy Days
☀️ Temperature Summary
January is one of the cooler months of the year for Rapid City, with highs averaging around 37°F. Overnight lows can reach 17°F.
You may want to consider a warmer month to visit Rapid City, unless you're ready to brave the cold.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In January you can expect close to a 2% chance of rain for any given day. It rains less than usual in January, with total rainfall for the month typically near 0 inches.
Rainfall Throughout the Year
Planning a trip to Rapid City? Try our free trip weather planner