S
M
T
W
T
F
S
26
109°
83°
27
109°
83°
28
107°
85°
29
108°
82°
30
104°
81°
31
102°
82°
1
102°
80°
2
101°
84°
3
102°
84°
4
103°
86°
5
105°
87°
6
107°
87°
7
108°
88°
8
108°
87°
9
107°
87°
10
105°
84°
11
103°
85°
12
103°
82°
13
102°
82°
14
102°
83°
15
103°
82°
16
101°
83°
17
102°
84°
18
103°
80°
19
101°
80°
20
102°
83°
21
102°
82°
22
101°
81°
23
100°
79°
24
Hist. Avg.
105°
83°
25
Hist. Avg.
105°
83°
26
Hist. Avg.
105°
83°
27
Hist. Avg.
105°
83°
28
Hist. Avg.
104°
83°
29
Hist. Avg.
104°
83°
30
Hist. Avg.
104°
82°
31
Hist. Avg.
104°
82°
1
Hist. Avg.
104°
82°
2
Hist. Avg.
104°
82°
3
Hist. Avg.
104°
82°
4
Hist. Avg.
104°
82°
5
Hist. Avg.
103°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Phoenix
Phoenix's August 2026 forecast shows daily high temperatures ranging from 100° to 109°, with overnight lows between 79° and 88°. The average high for August is 104° 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.
