S
M
T
W
T
F
S
26
85°
67°
27
84°
67°
28
82°
66°
29
81°
67°
30
80°
61°
31
79°
61°
1
79°
62°
2
78°
63°
3
79°
67°
4
80°
64°
5
82°
63°
6
84°
67°
7
83°
67°
8
80°
64°
9
80°
61°
10
81°
63°
11
81°
66°
12
85°
66°
13
86°
67°
14
85°
66°
15
81°
65°
16
85°
66°
17
86°
66°
18
84°
59°
19
80°
58°
20
78°
58°
21
79°
59°
22
79°
58°
23
80°
58°
24
80°
59°
25
81°
58°
26
82°
58°
27
83°
59°
28
84°
57°
29
79°
57°
30
79°
58°
31
83°
58°
1
84°
59°
2
80°
57°
3
79°
58°
4
82°
59°
5
84°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gilbert
Gilbert's August 2026 forecast shows daily high temperatures ranging from 78° to 86°, with overnight lows between 57° and 67°. The average high for August is 82° with an average low of 62°. 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 Gilbert. See also: September | October | November.