S
M
T
W
T
F
S
30
75°
50°
31
81°
45°
1
79°
47°
2
68°
59°
3
71°
61°
4
79°
60°
5
73°
54°
6
74°
54°
7
72°
50°
8
68°
48°
9
67°
53°
10
71°
51°
11
64°
45°
12
67°
47°
13
65°
48°
14
63°
49°
15
62°
45°
16
69°
49°
17
70°
48°
18
64°
43°
19
70°
48°
20
70°
47°
21
69°
47°
22
69°
46°
23
67°
47°
24
65°
44°
25
64°
46°
26
67°
46°
27
66°
47°
28
63°
44°
29
57°
41°
30
61°
42°
1
57°
38°
2
58°
39°
3
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glen
Glen's September 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 38° and 61°. The average high for September is 66° with an average low of 48°. 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 Glen. See also: October | November | December.