The weather in Rapid City in October is very cold with temperatures between 4°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rapid City during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
You can expect a few days of snow in Rapid City during October. It’s important to get out your snow boots and warm mittens to stay warm while you explore Rapid City.
Our weather forecast can give you a great sense of what weather to expect in Rapid City in October 2025.
If you’re planning to visit Rapid City in the near future, we highly recommend that you review the 14 day weather forecast for Rapid City before you arrive.
Temperatures
14° / 4°
Rainy Days
3
Snowy Days
4
Dry Days
23
Rainfall
63
mm
Sun Hours
11.1
Hrs
