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