S
M
T
W
T
F
S
30
100°
80°
31
101°
82°
1
101°
82°
2
102°
80°
3
101°
78°
4
100°
78°
5
100°
78°
6
101°
78°
7
101°
77°
8
102°
78°
9
102°
76°
10
100°
76°
11
99°
77°
12
99°
76°
13
101°
78°
14
102°
78°
15
103°
81°
16
104°
81°
17
104°
77°
18
102°
76°
19
102°
77°
20
96°
76°
21
98°
77°
22
99°
75°
23
94°
75°
24
93°
74°
25
94°
73°
26
95°
73°
27
94°
72°
28
Hist. Avg.
96°
74°
29
Hist. Avg.
96°
73°
30
Hist. Avg.
96°
73°
1
Hist. Avg.
95°
72°
2
Hist. Avg.
95°
72°
3
Hist. Avg.
94°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Phoenix
Phoenix's September 2026 forecast shows daily high temperatures ranging from 93° to 104°, with overnight lows between 72° and 82°. The average high for September is 100° with an average low of 77°. 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.
