S
M
T
W
T
F
S
30
102°
81°
31
103°
80°
1
104°
79°
2
104°
79°
3
103°
80°
4
102°
78°
5
102°
79°
6
101°
78°
7
100°
78°
8
101°
79°
9
102°
81°
10
101°
77°
11
101°
80°
12
100°
76°
13
99°
76°
14
98°
76°
15
Hist. Avg.
101°
79°
16
Hist. Avg.
101°
78°
17
Hist. Avg.
100°
78°
18
Hist. Avg.
100°
78°
19
Hist. Avg.
100°
77°
20
Hist. Avg.
99°
77°
21
Hist. Avg.
99°
76°
22
Hist. Avg.
99°
76°
23
Hist. Avg.
98°
76°
24
Hist. Avg.
98°
75°
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 South Phoenix
South Phoenix's September 2026 forecast shows daily high temperatures ranging from 98° to 104°, with overnight lows between 76° and 81°. The average high for September is 101° with an average low of 79°. 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 South Phoenix. See also: October | November | December.
