S
M
T
W
T
F
S
30
105°
79°
31
92°
80°
1
101°
80°
2
103°
87°
3
103°
85°
4
104°
84°
5
101°
83°
6
106°
83°
7
108°
82°
8
109°
88°
9
107°
90°
10
108°
89°
11
106°
90°
12
102°
85°
13
104°
84°
14
103°
80°
15
101°
81°
16
100°
81°
17
101°
80°
18
105°
81°
19
107°
80°
20
104°
78°
21
103°
79°
22
98°
76°
23
98°
78°
24
99°
77°
25
96°
69°
26
96°
74°
27
98°
73°
28
93°
68°
29
92°
68°
30
94°
69°
1
95°
71°
2
94°
70°
3
90°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Phoenix International Speedway
Phoenix International Speedway's September 2026 forecast shows daily high temperatures ranging from 90° to 107°, with overnight lows between 64° and 85°. The average high for September is 99° with an average low of 76°. 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 International Speedway. See also: October | November | December.
