S
M
T
W
T
F
S
30
90°
72°
31
91°
70°
1
88°
69°
2
86°
70°
3
87°
70°
4
86°
69°
5
84°
70°
6
84°
70°
7
83°
68°
8
84°
69°
9
85°
67°
10
83°
68°
11
83°
65°
12
85°
68°
13
88°
68°
14
86°
62°
15
83°
61°
16
82°
62°
17
81°
61°
18
84°
62°
19
86°
62°
20
86°
66°
21
85°
65°
22
82°
66°
23
83°
65°
24
82°
60°
25
81°
61°
26
84°
60°
27
83°
60°
28
83°
62°
29
84°
63°
30
84°
64°
1
83°
62°
2
83°
64°
3
84°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alliance
Alliance's September 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 60° and 72°. The average high for September is 84° with an average low of 65°. 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 Alliance. See also: October | November | December.
