S
M
T
W
T
F
S
26
79°
61°
27
78°
63°
28
79°
62°
29
77°
61°
30
77°
64°
31
78°
64°
1
80°
63°
2
83°
65°
3
83°
65°
4
82°
64°
5
78°
61°
6
77°
62°
7
78°
64°
8
80°
62°
9
77°
64°
10
81°
61°
11
76°
59°
12
76°
62°
13
81°
63°
14
79°
58°
15
74°
56°
16
74°
56°
17
75°
60°
18
76°
62°
19
75°
63°
20
78°
62°
21
78°
62°
22
75°
61°
23
75°
61°
24
80°
54°
25
80°
59°
26
83°
53°
27
77°
52°
28
72°
55°
29
71°
51°
30
71°
50°
31
72°
58°
1
75°
59°
2
71°
60°
3
77°
60°
4
81°
57°
5
82°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Idaho
Idaho's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 50° and 65°. The average high for August is 77° 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 Idaho. See also: September | October | November.
