S
M
T
W
T
F
S
26
110°
91°
27
113°
94°
28
107°
83°
29
111°
92°
30
113°
94°
31
115°
94°
1
116°
94°
2
115°
94°
3
116°
93°
4
107°
89°
5
105°
92°
6
107°
88°
7
111°
89°
8
113°
95°
9
111°
87°
10
108°
86°
11
104°
82°
12
102°
80°
13
101°
79°
14
101°
83°
15
107°
84°
16
110°
91°
17
113°
90°
18
114°
92°
19
110°
79°
20
106°
79°
21
112°
89°
22
115°
90°
23
113°
88°
24
108°
86°
25
115°
89°
26
117°
91°
27
113°
91°
28
114°
89°
29
110°
86°
30
106°
80°
31
103°
84°
1
103°
85°
2
105°
86°
3
108°
88°
4
107°
87°
5
103°
84°
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 103° to 114°, with overnight lows between 80° and 91°. The average high for August is 107° with an average low of 86°. 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.
