S
M
T
W
T
F
S
30
75°
54°
31
76°
53°
1
71°
65°
2
70°
64°
3
82°
59°
4
80°
54°
5
75°
54°
6
73°
47°
7
78°
44°
8
75°
48°
9
74°
55°
10
81°
59°
11
75°
46°
12
75°
40°
13
73°
62°
14
69°
44°
15
69°
39°
16
73°
59°
17
70°
57°
18
72°
41°
19
65°
46°
20
59°
47°
21
65°
45°
22
62°
43°
23
66°
51°
24
70°
50°
25
66°
49°
26
68°
48°
27
69°
47°
28
69°
46°
29
70°
33°
30
62°
40°
1
65°
45°
2
66°
44°
3
61°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glens Falls
Glens Falls's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 33° and 59°. The average high for September is 67° with an average low of 47°. 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 Glens Falls. See also: October | November | December.