S
M
T
W
T
F
S
30
108°
80°
31
108°
83°
1
107°
84°
2
108°
85°
3
107°
81°
4
100°
78°
5
98°
78°
6
99°
77°
7
98°
77°
8
99°
78°
9
100°
77°
10
99°
75°
11
99°
75°
12
98°
76°
13
98°
75°
14
99°
75°
15
98°
76°
16
98°
73°
17
97°
74°
18
97°
73°
19
98°
74°
20
98°
76°
21
97°
75°
22
94°
77°
23
100°
76°
24
97°
77°
25
Hist. Avg.
97°
75°
26
Hist. Avg.
97°
74°
27
Hist. Avg.
97°
74°
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 94° to 108°, with overnight lows between 73° and 85°. 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.
