S
M
T
W
T
F
S
26
64°
40°
27
65°
41°
28
66°
43°
29
66°
43°
30
63°
42°
1
64°
44°
2
67°
44°
3
68°
45°
4
69°
45°
5
68°
46°
6
70°
45°
7
65°
43°
8
61°
41°
9
59°
45°
10
60°
46°
11
70°
47°
12
70°
47°
13
72°
49°
14
74°
50°
15
74°
50°
16
72°
51°
17
70°
51°
18
71°
48°
19
65°
42°
20
64°
42°
21
63°
45°
22
64°
44°
23
74°
51°
24
76°
54°
25
75°
53°
26
75°
55°
27
73°
54°
28
80°
50°
29
76°
50°
30
69°
46°
31
73°
52°
1
79°
54°
2
80°
53°
3
80°
51°
4
79°
46°
5
71°
46°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Belle Fourche
Belle Fourche's May 2026 forecast shows daily high temperatures ranging from 59° to 80°, with overnight lows between 40° and 55°. The average high for May is 70° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Belle Fourche. See also: June | July | August.
