S
M
T
W
T
F
S
30
77°
62°
31
74°
58°
1
73°
58°
2
73°
54°
3
72°
57°
4
76°
56°
5
75°
58°
6
73°
58°
7
78°
60°
8
77°
59°
9
73°
58°
10
74°
58°
11
76°
57°
12
75°
57°
13
71°
56°
14
73°
57°
15
74°
57°
16
75°
56°
17
75°
56°
18
69°
54°
19
64°
51°
20
68°
55°
21
68°
55°
22
70°
54°
23
63°
50°
24
61°
49°
25
61°
47°
26
62°
46°
27
61°
50°
28
65°
51°
29
65°
52°
30
67°
51°
1
67°
49°
2
58°
48°
3
59°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
Diy-December Weather in Rapid City
Rapid City's Diy-December 2026 forecast shows daily high temperatures ranging from 58° to 78°, with overnight lows between 46° and 62°. The average high for Diy-December is 70° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how Diy-December weather will actually feel in Rapid City. See also: October | November | December.
