S
M
T
W
T
F
S
30
N/A
31
N/A
1
98°
71°
2
97°
72°
3
97°
71°
4
95°
71°
5
94°
68°
6
89°
64°
7
86°
63°
8
83°
62°
9
85°
63°
10
84°
58°
11
83°
56°
12
83°
57°
13
81°
58°
14
79°
55°
15
82°
60°
16
82°
61°
17
81°
61°
18
83°
60°
19
82°
61°
20
83°
61°
21
82°
60°
22
82°
60°
23
81°
59°
24
81°
59°
25
82°
58°
26
80°
59°
27
81°
58°
28
81°
58°
29
80°
57°
30
80°
57°
1
79°
56°
2
79°
57°
3
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tennessee
Tennessee's September 2026 forecast shows daily high temperatures ranging from 78° to 98°, with overnight lows between 55° and 72°. The average high for September is 84° 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 Tennessee. See also: October | November | December.
