S
M
T
W
T
F
S
30
87°
65°
31
87°
65°
1
90°
67°
2
93°
66°
3
90°
65°
4
91°
64°
5
90°
65°
6
86°
67°
7
80°
61°
8
81°
62°
9
85°
61°
10
87°
64°
11
86°
59°
12
85°
61°
13
82°
61°
14
81°
60°
15
82°
58°
16
81°
57°
17
74°
60°
18
72°
60°
19
73°
61°
20
74°
60°
21
74°
60°
22
75°
59°
23
78°
59°
24
76°
58°
25
73°
59°
26
74°
59°
27
77°
53°
28
72°
49°
29
69°
47°
30
69°
47°
1
70°
49°
2
69°
55°
3
68°
54°
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 68° to 91°, with overnight lows between 47° and 67°. The average high for September is 78° with an average low of 59°. 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.