S
M
T
W
T
F
S
26
107°
88°
27
104°
85°
28
103°
90°
29
108°
89°
30
109°
91°
31
111°
90°
1
113°
92°
2
115°
92°
3
113°
91°
4
111°
88°
5
107°
83°
6
106°
84°
7
108°
87°
8
107°
87°
9
107°
86°
10
106°
86°
11
101°
84°
12
104°
84°
13
102°
83°
14
102°
86°
15
105°
86°
16
101°
85°
17
104°
86°
18
107°
86°
19
106°
85°
20
107°
86°
21
107°
87°
22
106°
86°
23
107°
87°
24
107°
87°
25
106°
86°
26
107°
86°
27
107°
85°
28
106°
85°
29
106°
84°
30
104°
85°
31
105°
85°
1
106°
84°
2
106°
83°
3
100°
83°
4
103°
82°
5
103°
87°
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 115°, with overnight lows between 82° and 92°. The average high for August is 106° 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.
