S
M
T
W
T
F
S
26
81°
64°
27
86°
63°
28
88°
63°
29
84°
64°
30
88°
62°
31
87°
64°
1
89°
63°
2
80°
58°
3
82°
63°
4
88°
64°
5
88°
64°
6
89°
63°
7
80°
60°
8
83°
62°
9
87°
62°
10
87°
63°
11
88°
63°
12
86°
62°
13
87°
62°
14
77°
61°
15
77°
61°
16
78°
60°
17
78°
60°
18
83°
61°
19
85°
61°
20
85°
60°
21
78°
60°
22
85°
58°
23
87°
56°
24
81°
50°
25
82°
49°
26
74°
50°
27
74°
55°
28
76°
49°
29
76°
57°
30
77°
59°
31
85°
51°
1
79°
56°
2
84°
58°
3
85°
56°
4
77°
54°
5
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in North Spearfish
North Spearfish's August 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 49° and 64°. The average high for August is 83° with an average low of 59°. 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 North Spearfish. See also: September | October | November.
