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
61°
36°
8
52°
32°
9
54°
47°
10
61°
42°
11
48°
34°
12
56°
46°
13
60°
41°
14
53°
38°
15
52°
43°
16
52°
38°
17
51°
35°
18
49°
37°
19
48°
34°
20
46°
35°
21
47°
26°
22
49°
39°
23
49°
35°
24
44°
33°
25
45°
35°
26
42°
34°
27
43°
34°
28
53°
39°
29
51°
41°
30
54°
41°
1
52°
40°
2
51°
40°
3
53°
38°
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 42° to 61°, with overnight lows between 26° and 47°. The average high for September is 51° with an average low of 38°. 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.