S
M
T
W
T
F
S
30
81°
64°
31
86°
70°
1
91°
74°
2
91°
70°
3
91°
70°
4
86°
70°
5
81°
64°
6
77°
59°
7
79°
55°
8
84°
57°
9
88°
66°
10
81°
63°
11
79°
57°
12
77°
64°
13
82°
55°
14
70°
46°
15
90°
55°
16
86°
70°
17
81°
68°
18
75°
63°
19
79°
59°
20
79°
61°
21
63°
55°
22
61°
52°
23
59°
55°
24
68°
50°
25
70°
43°
26
72°
45°
27
73°
41°
28
73°
46°
29
77°
55°
30
77°
63°
1
82°
62°
2
65°
50°
3
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Knoxville
New Knoxville's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 50° and 63°. The average high for September is 73° with an average low of 56°. 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 New Knoxville. See also: October | November | December.
