S
M
T
W
T
F
S
30
72°
66°
31
82°
70°
1
91°
70°
2
98°
72°
3
81°
68°
4
78°
66°
5
82°
63°
6
79°
61°
7
78°
60°
8
81°
68°
9
82°
65°
10
77°
57°
11
79°
60°
12
82°
61°
13
81°
63°
14
75°
57°
15
77°
55°
16
74°
54°
17
74°
55°
18
73°
51°
19
73°
52°
20
70°
50°
21
74°
55°
22
66°
54°
23
68°
55°
24
70°
54°
25
75°
54°
26
74°
53°
27
71°
53°
28
74°
55°
29
75°
55°
30
75°
54°
1
74°
53°
2
71°
48°
3
61°
45°
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 61° to 82°, with overnight lows between 45° and 68°. The average high for September is 74° with an average low of 55°. 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.