S
M
T
W
T
F
S
30
83°
68°
31
86°
69°
1
88°
64°
2
83°
63°
3
83°
63°
4
84°
62°
5
82°
62°
6
83°
65°
7
85°
62°
8
84°
67°
9
87°
67°
10
86°
66°
11
85°
65°
12
86°
66°
13
86°
66°
14
85°
65°
15
86°
66°
16
86°
65°
17
83°
64°
18
83°
65°
19
82°
64°
20
82°
64°
21
83°
62°
22
82°
55°
23
78°
61°
24
75°
61°
25
Hist. Avg.
77°
56°
26
Hist. Avg.
76°
56°
27
Hist. Avg.
76°
55°
28
Hist. Avg.
76°
55°
29
Hist. Avg.
75°
54°
30
Hist. Avg.
75°
54°
1
Hist. Avg.
74°
54°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fairmount Heights
Fairmount Heights's September 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 55° and 69°. The average high for September is 84° with an average low of 64°. 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 Heights. See also: October | November | December.
