S
M
T
W
T
F
S
30
59°
44°
31
58°
33°
1
63°
31°
2
71°
34°
3
67°
35°
4
68°
44°
5
60°
35°
6
67°
35°
7
63°
34°
8
53°
30°
9
55°
27°
10
59°
40°
11
48°
38°
12
56°
51°
13
64°
40°
14
50°
38°
15
53°
43°
16
56°
40°
17
53°
38°
18
51°
33°
19
48°
34°
20
49°
36°
21
47°
35°
22
46°
38°
23
50°
35°
24
44°
33°
25
43°
31°
26
41°
30°
27
48°
33°
28
51°
35°
29
41°
31°
30
50°
39°
1
50°
39°
2
49°
38°
3
49°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fermont
Fermont's September 2026 forecast shows daily high temperatures ranging from 41° to 64°, with overnight lows between 30° and 51°. The average high for September is 50° with an average low of 37°. 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 Fermont. See also: October | November | December.