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