S
M
T
W
T
F
S
30
75°
57°
31
79°
52°
1
75°
55°
2
70°
60°
3
69°
58°
4
80°
63°
5
71°
59°
6
72°
50°
7
78°
51°
8
76°
52°
9
70°
65°
10
80°
54°
11
72°
46°
12
75°
49°
13
77°
57°
14
77°
55°
15
74°
59°
16
72°
48°
17
68°
47°
18
66°
50°
19
64°
44°
20
65°
44°
21
66°
46°
22
64°
50°
23
65°
51°
24
68°
50°
25
68°
50°
26
71°
47°
27
64°
44°
28
66°
46°
29
71°
49°
30
71°
50°
1
70°
49°
2
69°
49°
3
67°
48°
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 64° to 80°, with overnight lows between 44° and 65°. The average high for September is 70° with an average low of 50°. 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.