S
M
T
W
T
F
S
30
92°
73°
31
89°
69°
1
90°
67°
2
89°
67°
3
89°
70°
4
92°
69°
5
92°
68°
6
90°
70°
7
89°
70°
8
92°
71°
9
92°
66°
10
89°
65°
11
89°
69°
12
90°
64°
13
86°
63°
14
84°
62°
15
85°
61°
16
85°
63°
17
89°
62°
18
90°
63°
19
90°
61°
20
89°
66°
21
89°
67°
22
Hist. Avg.
86°
63°
23
Hist. Avg.
85°
62°
24
Hist. Avg.
85°
62°
25
Hist. Avg.
85°
62°
26
Hist. Avg.
84°
61°
27
Hist. Avg.
84°
61°
28
Hist. Avg.
84°
61°
29
Hist. Avg.
84°
60°
30
Hist. Avg.
84°
60°
1
Hist. Avg.
83°
59°
2
Hist. Avg.
83°
59°
3
Hist. Avg.
83°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Allen
Allen's September 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 61° and 73°. The average high for September is 89° with an average low of 66°. 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 Allen. See also: October | November | December.
