S
M
T
W
T
F
S
26
87°
65°
27
92°
66°
28
92°
65°
29
89°
66°
30
92°
65°
31
91°
65°
1
93°
64°
2
84°
60°
3
86°
65°
4
92°
65°
5
92°
66°
6
93°
65°
7
84°
62°
8
87°
64°
9
91°
64°
10
91°
65°
11
92°
64°
12
90°
63°
13
89°
63°
14
80°
62°
15
81°
62°
16
82°
61°
17
84°
62°
18
88°
62°
19
89°
61°
20
88°
62°
21
81°
60°
22
87°
58°
23
90°
55°
24
85°
49°
25
83°
48°
26
78°
49°
27
77°
53°
28
79°
49°
29
79°
56°
30
80°
58°
31
88°
49°
1
81°
56°
2
87°
57°
3
88°
54°
4
82°
53°
5
78°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Belle Fourche
Belle Fourche's August 2026 forecast shows daily high temperatures ranging from 77° to 93°, with overnight lows between 48° and 66°. The average high for August is 86° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Belle Fourche. See also: September | October | November.
