S
M
T
W
T
F
S
30
86°
58°
31
88°
60°
1
84°
60°
2
85°
62°
3
81°
60°
4
81°
60°
5
79°
57°
6
79°
58°
7
75°
57°
8
75°
57°
9
76°
51°
10
74°
52°
11
70°
47°
12
71°
48°
13
72°
48°
14
76°
50°
15
76°
54°
16
77°
54°
17
77°
53°
18
76°
54°
19
76°
54°
20
77°
53°
21
77°
53°
22
76°
52°
23
76°
53°
24
77°
52°
25
74°
51°
26
72°
50°
27
73°
49°
28
73°
48°
29
72°
48°
30
73°
49°
1
73°
48°
2
74°
49°
3
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cass
Cass's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 47° and 62°. The average high for September is 76° with an average low of 53°. 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 Cass. See also: October | November | December.
