S
M
T
W
T
F
S
31
75°
45°
1
79°
46°
2
82°
50°
3
80°
48°
4
68°
49°
5
72°
49°
6
67°
45°
7
69°
43°
8
70°
40°
9
76°
42°
10
80°
48°
11
81°
48°
12
83°
51°
13
79°
54°
14
85°
60°
15
85°
58°
16
83°
53°
17
85°
55°
18
90°
54°
19
89°
56°
20
89°
62°
21
83°
64°
22
70°
60°
23
79°
62°
24
79°
64°
25
76°
57°
26
79°
51°
27
84°
52°
28
87°
55°
29
86°
56°
30
85°
54°
1
81°
54°
2
82°
50°
3
87°
52°
4
84°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marion
Marion's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Marion. See also: October | November | December.