S
M
T
W
T
F
S
30
106°
82°
31
91°
75°
1
101°
80°
2
104°
86°
3
103°
86°
4
104°
85°
5
104°
86°
6
106°
83°
7
107°
83°
8
108°
86°
9
106°
83°
10
107°
85°
11
103°
76°
12
101°
77°
13
100°
76°
14
101°
75°
15
99°
75°
16
100°
76°
17
103°
78°
18
104°
74°
19
100°
70°
20
96°
69°
21
92°
64°
22
93°
64°
23
95°
66°
24
95°
66°
25
96°
67°
26
100°
71°
27
97°
67°
28
89°
62°
29
90°
64°
30
94°
60°
1
89°
60°
2
91°
63°
3
92°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tempe
Tempe's September 2026 forecast shows daily high temperatures ranging from 89° to 108°, with overnight lows between 60° and 86°. The average high for September is 98° with an average low of 71°. 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 Tempe. See also: October | November | December.
