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