Weather · Rapid City, United States
Rapid City Weather in May
May in Rapid City averages 19°C by day and 8°C at night, with about 64mm of rain. That makes it a reasonable time to visit.
Avg high
19°C
66°F
Avg low
8°C
46°F
Rainfall
64mm
#9 wettest of 12
What to pack
Layers, plus a jacket for mornings and nights. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in Rapid City builds it around the season for you.