S
M
T
W
T
F
S
26
82°
61°
27
80°
62°
28
81°
62°
29
81°
65°
30
82°
64°
31
81°
66°
1
81°
65°
2
82°
63°
3
80°
63°
4
80°
62°
5
81°
60°
6
81°
61°
7
82°
62°
8
81°
61°
9
82°
60°
10
80°
60°
11
83°
61°
12
80°
60°
13
79°
60°
14
79°
61°
15
80°
60°
16
81°
60°
17
85°
61°
18
85°
60°
19
84°
66°
20
85°
65°
21
81°
66°
22
85°
65°
23
85°
58°
24
78°
61°
25
78°
66°
26
84°
61°
27
84°
59°
28
81°
65°
29
78°
66°
30
84°
57°
31
82°
56°
1
76°
55°
2
75°
56°
3
Hist. Avg.
78°
57°
4
Hist. Avg.
77°
57°
5
Hist. Avg.
77°
57°
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 75° to 85°, with overnight lows between 55° and 66°. The average high for August is 81° with an average low of 62°. 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.
