S
M
T
W
T
F
S
30
59°
30°
31
53°
40°
1
60°
27°
2
60°
26°
3
61°
41°
4
64°
45°
5
66°
44°
6
62°
45°
7
59°
44°
8
58°
41°
9
57°
38°
10
56°
37°
11
55°
35°
12
53°
35°
13
55°
36°
14
51°
31°
15
50°
31°
16
48°
31°
17
48°
32°
18
49°
31°
19
47°
30°
20
47°
29°
21
48°
28°
22
46°
28°
23
46°
29°
24
45°
27°
25
44°
27°
26
43°
25°
27
42°
26°
28
42°
25°
29
43°
24°
30
41°
25°
1
41°
29°
2
42°
30°
3
41°
29°
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 66°, with overnight lows between 24° and 45°. The average high for September is 51° with an average low of 32°. 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.
