February in Rapid City is the snowiest month of the year. In February, the weather in Rapid City is typically cold. Average daily high temperature in February is about 3 degrees above zero. On average, Rapid City has 12 sunny, 11 partly cloudy, 4 snowy, and 2 cloudy days in February. The snowfalls are usually light. February as well as January, March, April, and May is considered the most uncomfortable time to visit Rapid City.