S
M
T
W
T
F
S
30
91°
63°
31
93°
65°
1
93°
65°
2
95°
66°
3
96°
65°
4
97°
67°
5
87°
67°
6
83°
66°
7
78°
60°
8
83°
60°
9
86°
64°
10
85°
65°
11
84°
62°
12
85°
62°
13
86°
63°
14
85°
58°
15
84°
55°
16
83°
57°
17
84°
59°
18
82°
58°
19
78°
55°
20
78°
59°
21
85°
59°
22
83°
59°
23
83°
58°
24
82°
58°
25
83°
57°
26
83°
58°
27
82°
58°
28
83°
57°
29
82°
57°
30
82°
56°
1
80°
56°
2
80°
52°
3
72°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greeneville
Greeneville's September 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 47° and 66°. The average high for September is 82° with an average low of 58°. 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 Greeneville. See also: October | November | December.
