S
M
T
W
T
F
S
26
99°
80°
27
100°
79°
28
101°
76°
29
101°
75°
30
102°
75°
31
101°
76°
1
104°
81°
2
105°
83°
3
106°
82°
4
104°
78°
5
102°
75°
6
100°
76°
7
99°
76°
8
105°
81°
9
100°
78°
10
100°
78°
11
106°
78°
12
Hist. Avg.
105°
77°
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 106°, with overnight lows between 75° and 83°. The average high for August is 102° 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.
