S
M
T
W
T
F
S
29
75°
39°
30
76°
37°
31
41°
33°
1
41°
30°
2
45°
31°
3
33°
24°
4
54°
30°
5
63°
27°
6
43°
22°
7
72°
22°
8
60°
26°
9
49°
28°
10
64°
27°
11
86°
43°
12
77°
48°
13
76°
42°
14
65°
32°
15
72°
38°
16
69°
33°
17
45°
32°
18
52°
24°
19
63°
30°
20
78°
40°
21
84°
45°
22
91°
54°
23
63°
34°
24
40°
33°
25
45°
31°
26
42°
33°
27
43°
32°
28
52°
35°
29
59°
31°
30
59°
27°
1
61°
34°
2
80°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Rapid City
Rapid City's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Rapid City. See also: May | June | July.