S
M
T
W
T
F
S
30
91°
73°
31
91°
72°
1
90°
71°
2
92°
72°
3
91°
71°
4
91°
72°
5
90°
71°
6
90°
71°
7
91°
70°
8
91°
71°
9
90°
70°
10
92°
71°
11
91°
70°
12
90°
71°
13
91°
70°
14
88°
67°
15
88°
66°
16
88°
66°
17
89°
65°
18
89°
59°
19
79°
56°
20
78°
57°
21
82°
61°
22
83°
58°
23
86°
61°
24
85°
61°
25
83°
60°
26
85°
60°
27
83°
59°
28
83°
60°
29
78°
55°
30
76°
57°
1
82°
58°
2
83°
58°
3
83°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rossville
Rossville's September 2026 forecast shows daily high temperatures ranging from 76° to 92°, with overnight lows between 55° and 73°. The average high for September is 87° with an average low of 65°. 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 Rossville. See also: October | November | December.