S
M
T
W
T
F
S
30
73°
60°
31
73°
60°
1
74°
61°
2
74°
61°
3
75°
62°
4
76°
60°
5
74°
59°
6
75°
60°
7
72°
58°
8
73°
57°
9
71°
62°
10
72°
57°
11
71°
57°
12
71°
58°
13
74°
63°
14
75°
59°
15
76°
60°
16
77°
63°
17
77°
64°
18
78°
63°
19
77°
54°
20
75°
54°
21
67°
60°
22
68°
58°
23
71°
60°
24
73°
61°
25
74°
53°
26
73°
50°
27
70°
51°
28
64°
52°
29
64°
52°
30
64°
52°
1
63°
51°
2
63°
47°
3
Hist. Avg.
66°
48°
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 63° to 78°, with overnight lows between 47° and 64°. The average high for September is 72° with an average low of 58°. 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.
