S
M
T
W
T
F
S
30
87°
67°
31
N/A
1
86°
65°
2
86°
68°
3
88°
69°
4
89°
70°
5
87°
67°
6
87°
65°
7
78°
63°
8
80°
62°
9
78°
55°
10
76°
54°
11
73°
46°
12
80°
61°
13
79°
61°
14
80°
60°
15
80°
59°
16
78°
57°
17
79°
59°
18
80°
59°
19
78°
57°
20
77°
57°
21
79°
59°
22
79°
59°
23
78°
58°
24
79°
58°
25
78°
57°
26
77°
57°
27
78°
56°
28
78°
56°
29
77°
55°
30
77°
57°
1
76°
56°
2
76°
55°
3
75°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fairmont
Fairmont's September 2026 forecast shows daily high temperatures ranging from 73° to 89°, with overnight lows between 46° and 70°. The average high for September is 80° with an average low of 59°. 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 Fairmont. See also: October | November | December.
