Rapid City Weather Year-Round — Best Time to Visit
Rapid City, United States has cool weather year-round. The best time to visit is August (score: 88/100). Annual average high: 14.9°C, total rainfall: 557mm.
When is the best time to visit Rapid City?
88
August is the best month to visit Rapid City with a travel score of 88/100 (Excellent).
Expect highs of 28.5°C, 9 rain days, and 12.6 hours of daily sunshine.
View August weather details →Travel Score by Month
57
Jan
58
Feb
64
Mar
66
Apr
72
May
82
Jun
86
Jul
88
Aug
88
Sep
73
Oct
66
Nov
57
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Rapid City each month?
14.9°C
Avg High
3.6°C
Avg Low
557mm
Annual Rain
How much rain does Rapid City get?
Rapid City receives 557mm of rain annually. The wettest month is typically May with 102mm, while January is the driest.
What is the weather like each month in Rapid City?
January
57
3°C
Low: -8°C
4 rain days
Mixed
February
58
3°C
Low: -8°C
5 rain days
Mixed
March
64
8°C
Low: -4°C
7 rain days
Good
April
66
13°C
Low: 1°C
11 rain days
Good
May
72
19°C
Low: 7°C
13 rain days
Good
June
82
25°C
Low: 13°C
12 rain days
Excellent
July
86
30°C
Low: 17°C
10 rain days
Excellent
August
Best time to visit88
29°C
Low: 16°C
9 rain days
Excellent
September
88
24°C
Low: 12°C
6 rain days
Excellent
October
73
15°C
Low: 4°C
6 rain days
Good
November
66
8°C
Low: -2°C
4 rain days
Good
December
57
3°C
Low: -7°C
4 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31