S
M
T
W
T
F
S
30
82°
61°
31
81°
66°
1
88°
70°
2
90°
70°
3
84°
66°
4
79°
66°
5
79°
57°
6
75°
54°
7
77°
55°
8
81°
50°
9
84°
61°
10
79°
66°
11
79°
57°
12
82°
57°
13
82°
66°
14
68°
50°
15
77°
46°
16
84°
57°
17
81°
68°
18
75°
57°
19
72°
59°
20
72°
64°
21
63°
55°
22
59°
55°
23
66°
46°
24
66°
41°
25
71°
43°
26
71°
50°
27
64°
53°
28
65°
54°
29
70°
51°
30
72°
55°
1
76°
59°
2
72°
54°
3
70°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fairmont City
Fairmont City's September 2026 forecast shows daily high temperatures ranging from 64° to 76°, with overnight lows between 43° and 59°. The average high for September is 70° with an average low of 53°. 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 City. See also: October | November | December.