S
M
T
W
T
F
S
30
98°
72°
31
102°
74°
1
99°
73°
2
104°
76°
3
83°
77°
4
97°
77°
5
99°
74°
6
94°
72°
7
97°
72°
8
96°
76°
9
98°
75°
10
97°
74°
11
97°
76°
12
100°
76°
13
99°
75°
14
98°
74°
15
99°
73°
16
96°
72°
17
93°
70°
18
92°
70°
19
93°
67°
20
90°
67°
21
89°
66°
22
93°
71°
23
92°
70°
24
91°
70°
25
88°
69°
26
91°
69°
27
91°
68°
28
90°
69°
29
90°
69°
30
87°
65°
1
83°
59°
2
79°
58°
3
80°
58°
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 79° to 100°, with overnight lows between 58° and 76°. The average high for September is 92° with an average low of 69°. 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.