S
M
T
W
T
F
S
30
93°
72°
31
96°
72°
1
98°
72°
2
100°
74°
3
100°
75°
4
101°
75°
5
101°
76°
6
98°
75°
7
90°
72°
8
92°
71°
9
95°
68°
10
93°
68°
11
95°
73°
12
83°
70°
13
88°
70°
14
91°
70°
15
91°
72°
16
91°
72°
17
90°
68°
18
83°
65°
19
82°
62°
20
82°
64°
21
81°
62°
22
83°
62°
23
82°
61°
24
85°
65°
25
85°
64°
26
84°
62°
27
84°
64°
28
85°
64°
29
85°
63°
30
84°
64°
1
84°
63°
2
83°
62°
3
83°
62°
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 81° to 95°, with overnight lows between 61° and 73°. The average high for September is 86° with an average low of 66°. 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.