S
M
T
W
T
F
S
30
81°
51°
31
83°
52°
1
70°
58°
2
73°
62°
3
77°
61°
4
84°
63°
5
77°
56°
6
74°
49°
7
82°
44°
8
79°
51°
9
72°
49°
10
86°
60°
11
76°
47°
12
78°
41°
13
68°
59°
14
70°
47°
15
72°
39°
16
81°
50°
17
79°
58°
18
78°
56°
19
65°
42°
20
58°
49°
21
68°
44°
22
64°
42°
23
65°
39°
24
65°
43°
25
65°
51°
26
65°
47°
27
68°
44°
28
69°
43°
29
69°
47°
30
70°
47°
1
69°
46°
2
70°
48°
3
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Loudon
Loudon's September 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 39° and 51°. The average high for September is 66° with an average low of 46°. 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 Loudon. See also: October | November | December.
