S
M
T
W
T
F
S
30
81°
55°
31
82°
60°
1
82°
60°
2
80°
54°
3
79°
50°
4
73°
50°
5
72°
54°
6
73°
58°
7
79°
57°
8
79°
52°
9
72°
50°
10
73°
57°
11
72°
58°
12
79°
58°
13
79°
57°
14
78°
56°
15
79°
51°
16
77°
54°
17
70°
47°
18
74°
46°
19
68°
44°
20
68°
43°
21
66°
44°
22
67°
52°
23
68°
45°
24
68°
44°
25
66°
51°
26
70°
51°
27
68°
52°
28
73°
50°
29
74°
45°
30
71°
44°
1
65°
49°
2
71°
48°
3
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Franklin
Franklin's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 43° and 60°. The average high for September is 73° with an average low of 51°. 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 Franklin. See also: October | November | December.