S
M
T
W
T
F
S
26
107°
81°
27
106°
76°
28
102°
78°
29
103°
80°
30
103°
80°
31
105°
79°
1
106°
82°
2
107°
82°
3
107°
81°
4
106°
81°
5
106°
79°
6
103°
76°
7
100°
75°
8
99°
76°
9
99°
76°
10
100°
75°
11
99°
75°
12
100°
74°
13
Hist. Avg.
105°
77°
14
Hist. Avg.
105°
77°
15
Hist. Avg.
105°
77°
16
Hist. Avg.
105°
77°
17
Hist. Avg.
105°
77°
18
Hist. Avg.
105°
76°
19
Hist. Avg.
105°
76°
20
Hist. Avg.
105°
76°
21
Hist. Avg.
105°
76°
22
Hist. Avg.
105°
76°
23
Hist. Avg.
105°
76°
24
Hist. Avg.
105°
76°
25
Hist. Avg.
105°
76°
26
Hist. Avg.
104°
75°
27
Hist. Avg.
104°
75°
28
Hist. Avg.
104°
75°
29
Hist. Avg.
104°
75°
30
Hist. Avg.
104°
75°
31
Hist. Avg.
104°
74°
1
Hist. Avg.
104°
74°
2
Hist. Avg.
104°
74°
3
Hist. Avg.
104°
74°
4
Hist. Avg.
104°
74°
5
Hist. Avg.
103°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in San Tan Valley
San Tan Valley's August 2026 forecast shows daily high temperatures ranging from 99° to 107°, with overnight lows between 74° and 82°. The average high for August is 103° with an average low of 78°. 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.
