S
M
T
W
T
F
S
26
109°
84°
27
110°
88°
28
105°
81°
29
109°
86°
30
112°
89°
31
113°
87°
1
116°
88°
2
114°
86°
3
112°
92°
4
107°
84°
5
105°
90°
6
106°
82°
7
110°
84°
8
111°
88°
9
112°
88°
10
107°
82°
11
103°
80°
12
101°
82°
13
97°
75°
14
102°
74°
15
108°
78°
16
107°
82°
17
112°
79°
18
113°
86°
19
109°
88°
20
104°
79°
21
111°
83°
22
113°
82°
23
112°
85°
24
107°
79°
25
113°
80°
26
116°
84°
27
114°
86°
28
114°
87°
29
109°
83°
30
104°
81°
31
100°
79°
1
99°
77°
2
100°
79°
3
102°
80°
4
103°
80°
5
100°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Tan Valley
San Tan Valley's August 2026 forecast shows daily high temperatures ranging from 99° to 116°, with overnight lows between 77° and 87°. The average high for August is 106° with an average low of 82°. 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 San Tan Valley. See also: September | October | November.
