S
M
T
W
T
F
S
30
86°
79°
31
88°
76°
1
90°
80°
2
91°
75°
3
91°
74°
4
88°
76°
5
89°
74°
6
92°
74°
7
90°
76°
8
92°
75°
9
90°
75°
10
83°
76°
11
90°
75°
12
89°
73°
13
90°
75°
14
92°
76°
15
93°
78°
16
87°
75°
17
89°
71°
18
88°
73°
19
87°
73°
20
86°
70°
21
86°
71°
22
85°
68°
23
84°
69°
24
85°
68°
25
84°
68°
26
82°
71°
27
83°
71°
28
83°
71°
29
83°
70°
30
84°
71°
1
83°
71°
2
84°
70°
3
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Phoenix
Phoenix's September 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 68° and 78°. The average high for September is 86° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Phoenix. See also: October | November | December.
