S
M
T
W
T
F
S
26
108°
88°
27
109°
90°
28
104°
84°
29
108°
88°
30
109°
90°
31
113°
90°
1
113°
87°
2
111°
90°
3
113°
90°
4
104°
87°
5
102°
90°
6
104°
84°
7
108°
87°
8
109°
93°
9
109°
88°
10
106°
84°
11
100°
81°
12
100°
80°
13
99°
76°
14
100°
82°
15
106°
86°
16
108°
84°
17
112°
88°
18
112°
90°
19
110°
84°
20
108°
83°
21
109°
82°
22
112°
85°
23
110°
80°
24
109°
81°
25
109°
81°
26
105°
79°
27
103°
74°
28
103°
78°
29
104°
77°
30
101°
77°
31
102°
76°
1
104°
72°
2
100°
72°
3
101°
75°
4
104°
77°
5
105°
77°
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 100° to 112°, with overnight lows between 72° and 90°. The average high for August is 106° with an average low of 80°. 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.