S
M
T
W
T
F
S
30
88°
67°
31
88°
68°
1
87°
68°
2
88°
67°
3
83°
67°
4
81°
65°
5
81°
63°
6
80°
61°
7
80°
60°
8
85°
66°
9
86°
65°
10
83°
66°
11
87°
57°
12
80°
61°
13
81°
58°
14
80°
57°
15
79°
64°
16
82°
63°
17
85°
63°
18
85°
62°
19
86°
56°
20
78°
55°
21
77°
55°
22
77°
56°
23
78°
58°
24
79°
61°
25
82°
61°
26
80°
60°
27
82°
60°
28
80°
57°
29
81°
57°
30
82°
52°
1
77°
56°
2
79°
59°
3
76°
49°
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 76° to 88°, with overnight lows between 49° and 68°. The average high for September is 82° with an average low of 61°. 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.