S
M
T
W
T
F
S
30
88°
48°
31
92°
51°
1
75°
54°
2
60°
52°
3
66°
51°
4
68°
48°
5
75°
48°
6
68°
53°
7
80°
46°
8
90°
50°
9
96°
53°
10
94°
56°
11
87°
53°
12
73°
47°
13
71°
51°
14
80°
42°
15
82°
47°
16
82°
45°
17
69°
48°
18
83°
49°
19
88°
48°
20
92°
49°
21
85°
53°
22
81°
51°
23
79°
44°
24
82°
52°
25
70°
44°
26
75°
47°
27
77°
43°
28
78°
43°
29
82°
48°
30
80°
47°
1
80°
45°
2
76°
46°
3
82°
47°
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 70° to 82°, with overnight lows between 43° and 52°. The average high for September is 78° with an average low of 46°. 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.
