S
M
T
W
T
F
S
30
84°
64°
31
85°
62°
1
90°
58°
2
90°
59°
3
92°
57°
4
94°
56°
5
95°
60°
6
89°
59°
7
88°
61°
8
84°
58°
9
81°
54°
10
89°
50°
11
93°
58°
12
85°
51°
13
95°
52°
14
89°
66°
15
81°
52°
16
81°
49°
17
75°
62°
18
83°
58°
19
79°
54°
20
72°
54°
21
76°
51°
22
81°
56°
23
76°
58°
24
73°
55°
25
74°
57°
26
76°
54°
27
76°
54°
28
74°
51°
29
72°
50°
30
70°
50°
1
67°
49°
2
70°
41°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Green Mountain
Green Mountain's September 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 41° and 58°. The average high for September is 73° with an average low of 52°. 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 Green Mountain. See also: October | November | December.
