S
M
T
W
T
F
S
30
64°
41°
31
61°
40°
1
61°
38°
2
56°
34°
3
56°
34°
4
55°
33°
5
54°
33°
6
53°
35°
7
53°
36°
8
54°
38°
9
56°
38°
10
54°
40°
11
58°
38°
12
59°
37°
13
58°
38°
14
57°
39°
15
58°
38°
16
58°
38°
17
59°
36°
18
58°
36°
19
58°
35°
20
56°
36°
21
56°
35°
22
54°
33°
23
52°
26°
24
49°
31°
25
52°
28°
26
49°
27°
27
46°
26°
28
44°
26°
29
44°
27°
30
45°
24°
1
43°
23°
2
41°
25°
3
42°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glennallen
Glennallen's September 2026 forecast shows daily high temperatures ranging from 41° to 64°, with overnight lows between 23° and 41°. The average high for September is 54° with an average low of 33°. 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 Glennallen. See also: October | November | December.
