Typical Weather in Rapid City, SD in May
64° F Avg High
44° F Avg Low
7 Rainy Days
☀️ Temperature Summary
May is one of the warmer months of the year for Rapid City, with highs averaging around 64°F. Lows overnight are typically around 44°F. Temperatures will generally increase as the month goes on, with daily high temperatures ranging between 61°F and 70°F.
May is a great time to visit Rapid City, with mild temperatures and sunny days being very common.
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 May you can expect close to a 24% chance of rain for any given day. It rains more than usual in May, with total rainfall for the month typically near 4 inches.
Rainfall Throughout the Year
Planning a trip to Rapid City? Try our free trip weather planner