S
M
T
W
T
F
S
26
90°
74°
27
90°
75°
28
91°
75°
29
90°
76°
30
90°
75°
31
91°
74°
1
90°
74°
2
90°
75°
3
91°
74°
4
90°
73°
5
90°
75°
6
92°
75°
7
93°
74°
8
91°
74°
9
89°
75°
10
89°
74°
11
90°
74°
12
91°
75°
13
90°
74°
14
91°
75°
15
91°
73°
16
90°
74°
17
91°
75°
18
92°
76°
19
92°
76°
20
90°
74°
21
90°
74°
22
92°
75°
23
93°
76°
24
92°
74°
25
93°
74°
26
92°
75°
27
92°
74°
28
91°
75°
29
91°
73°
30
92°
74°
31
91°
75°
1
90°
74°
2
88°
74°
3
91°
75°
4
89°
76°
5
89°
73°
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 88° to 93°, with overnight lows between 73° and 76°. The average high for August is 91° with an average low of 75°. 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.
