S
M
T
W
T
F
S
30
82°
64°
31
88°
49°
1
92°
71°
2
91°
49°
3
92°
49°
4
92°
49°
5
92°
49°
6
92°
56°
7
79°
58°
8
84°
66°
9
86°
66°
10
78°
52°
11
76°
55°
12
80°
62°
13
82°
58°
14
78°
54°
15
78°
51°
16
76°
53°
17
77°
55°
18
76°
53°
19
74°
55°
20
75°
57°
21
76°
57°
22
70°
56°
23
73°
56°
24
78°
55°
25
79°
57°
26
79°
56°
27
78°
56°
28
79°
55°
29
79°
57°
30
78°
56°
1
78°
53°
2
76°
45°
3
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fairmount
Fairmount's September 2026 forecast shows daily high temperatures ranging from 64° to 92°, with overnight lows between 42° and 66°. The average high for September is 78° with an average low of 55°. 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 Fairmount. See also: October | November | December.
