S
M
T
W
T
F
S
26
106°
81°
27
104°
81°
28
106°
80°
29
106°
81°
30
107°
82°
31
107°
82°
1
106°
81°
2
108°
82°
3
107°
82°
4
107°
81°
5
106°
81°
6
105°
80°
7
105°
81°
8
106°
81°
9
107°
80°
10
107°
81°
11
106°
80°
12
100°
79°
13
100°
79°
14
101°
75°
15
101°
77°
16
104°
75°
17
105°
77°
18
103°
76°
19
101°
77°
20
104°
78°
21
105°
81°
22
106°
80°
23
107°
80°
24
106°
79°
25
106°
79°
26
105°
78°
27
105°
76°
28
106°
74°
29
105°
74°
30
104°
72°
31
103°
71°
1
104°
74°
2
105°
78°
3
106°
73°
4
106°
71°
5
104°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Phoenix–Mesa Gateway Airport
Phoenix–Mesa Gateway Airport's August 2026 forecast shows daily high temperatures ranging from 100° to 108°, with overnight lows between 71° and 82°. The average high for August is 105° with an average low of 78°. 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–Mesa Gateway Airport. See also: September | October | November.
