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