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
104°
90°
6
109°
91°
7
115°
91°
8
115°
91°
9
111°
89°
10
105°
86°
11
103°
87°
12
104°
80°
13
103°
86°
14
103°
85°
15
104°
84°
16
106°
86°
17
105°
83°
18
105°
83°
19
102°
82°
20
104°
84°
21
104°
85°
22
106°
86°
23
107°
86°
24
107°
85°
25
105°
85°
26
102°
86°
27
101°
83°
28
103°
85°
29
102°
82°
30
100°
84°
31
106°
85°
1
105°
84°
2
106°
83°
3
99°
82°
4
98°
79°
5
99°
81°
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 115°, with overnight lows between 79° and 91°. The average high for August is 105° with an average low of 85°. 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.
