Weather in Rapid City: May
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Average day temperature: | 63.8°F |
| Average night temperature: | 47.5°F | |
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Number of sunny days: | 14 days |
| Day length: | 14.2 - 15.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
| more information | ||
14 days
forecast
forecast
| Rapid City |
weather in
June
June
| Rapid City |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 89°F. At the same time the lowest night temperature was 30°F. Daily and nightly averages during May were 70.3°F and 50.6°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Rapid City in May is 1.2 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 9.2 mph It makes May one of the most windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 9.4.
Best time for vacation in Rapid City
Rapid City on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Rapid City
Local time: 13:24
June 08, monday
1500
79°F
NW
15 mph
15 mph
1800
81°F
NW
13 mph
13 mph
2100
73°F
NW
5 mph
5 mph
June 09, tuesday
0000
61°F
NE
6 mph
6 mph
0300
59°F
N
11 mph
11 mph
0600
63°F
N
14 mph
14 mph
0900
79°F
N
21 mph
21 mph
1200
91°F
NE
20 mph
20 mph
