S
M
T
W
T
F
S
30
84°
61°
31
85°
56°
1
85°
53°
2
81°
59°
3
79°
51°
4
74°
50°
5
78°
52°
6
80°
58°
7
81°
49°
8
75°
51°
9
76°
57°
10
74°
56°
11
80°
57°
12
83°
56°
13
83°
56°
14
84°
58°
15
83°
57°
16
84°
55°
17
Hist. Avg.
75°
49°
18
Hist. Avg.
75°
49°
19
Hist. Avg.
74°
48°
20
Hist. Avg.
74°
48°
21
Hist. Avg.
73°
48°
22
Hist. Avg.
73°
47°
23
Hist. Avg.
73°
47°
24
Hist. Avg.
72°
46°
25
Hist. Avg.
72°
46°
26
Hist. Avg.
71°
45°
27
Hist. Avg.
71°
45°
28
Hist. Avg.
71°
44°
29
Hist. Avg.
70°
44°
30
Hist. Avg.
70°
44°
1
Hist. Avg.
69°
43°
2
Hist. Avg.
69°
43°
3
Hist. Avg.
68°
42°
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 74° to 85°, with overnight lows between 49° and 61°. The average high for September is 81° with an average low of 55°. 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.
