S
M
T
W
T
F
S
30
70°
63°
31
78°
66°
1
88°
66°
2
87°
66°
3
78°
64°
4
77°
63°
5
76°
55°
6
74°
50°
7
77°
48°
8
80°
52°
9
78°
68°
10
72°
52°
11
74°
44°
12
82°
56°
13
73°
52°
14
67°
40°
15
69°
55°
16
66°
60°
17
69°
58°
18
66°
56°
19
61°
55°
20
65°
56°
21
63°
53°
22
66°
55°
23
67°
53°
24
68°
51°
25
66°
52°
26
68°
52°
27
70°
53°
28
69°
52°
29
66°
46°
30
66°
53°
1
69°
52°
2
61°
51°
3
60°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Caseville
Caseville's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 46° and 60°. The average high for September is 66° 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 Caseville. See also: October | November | December.