S
M
T
W
T
F
S
30
81°
59°
31
86°
58°
1
85°
61°
2
86°
62°
3
82°
59°
4
80°
57°
5
84°
57°
6
85°
62°
7
85°
57°
8
80°
56°
9
84°
59°
10
84°
61°
11
83°
60°
12
84°
62°
13
84°
58°
14
78°
54°
15
78°
54°
16
80°
55°
17
79°
58°
18
82°
57°
19
82°
58°
20
81°
59°
21
76°
57°
22
79°
56°
23
79°
57°
24
80°
55°
25
75°
50°
26
73°
49°
27
Hist. Avg.
78°
55°
28
Hist. Avg.
77°
55°
29
Hist. Avg.
77°
54°
30
Hist. Avg.
77°
54°
1
Hist. Avg.
76°
54°
2
Hist. Avg.
76°
53°
3
Hist. Avg.
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rocky Top
Rocky Top's September 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 49° and 62°. The average high for September is 81° with an average low of 57°. 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 Rocky Top. See also: October | November | December.