S
M
T
W
T
F
S
26
101°
83°
27
102°
84°
28
107°
86°
29
107°
83°
30
102°
84°
31
102°
85°
1
104°
87°
2
106°
84°
3
101°
81°
4
101°
83°
5
102°
83°
6
103°
85°
7
107°
84°
8
106°
86°
9
107°
86°
10
109°
83°
11
105°
84°
12
103°
86°
13
105°
83°
14
103°
81°
15
103°
84°
16
106°
86°
17
108°
86°
18
109°
87°
19
109°
87°
20
108°
86°
21
109°
86°
22
107°
83°
23
106°
83°
24
104°
82°
25
105°
80°
26
105°
81°
27
106°
81°
28
108°
82°
29
107°
82°
30
108°
80°
31
108°
83°
1
107°
84°
2
108°
85°
3
107°
81°
4
100°
78°
5
98°
78°
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 98° to 109°, with overnight lows between 78° and 87°. The average high for August is 105° 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.
