S
M
T
W
T
F
S
30
90°
54°
31
85°
52°
1
83°
54°
2
90°
54°
3
94°
57°
4
94°
55°
5
94°
59°
6
88°
59°
7
86°
56°
8
91°
55°
9
81°
50°
10
79°
47°
11
80°
51°
12
84°
48°
13
85°
48°
14
68°
52°
15
82°
51°
16
83°
52°
17
84°
51°
18
82°
50°
19
79°
50°
20
82°
49°
21
82°
49°
22
81°
48°
23
81°
49°
24
80°
49°
25
80°
48°
26
79°
48°
27
78°
47°
28
78°
47°
29
76°
46°
30
77°
46°
1
76°
45°
2
76°
44°
3
75°
44°
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 68° to 94°, with overnight lows between 44° and 59°. The average high for September is 82° with an average low of 50°. 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.
