S
M
T
W
T
F
S
31
77°
45°
1
77°
47°
2
78°
49°
3
67°
43°
4
61°
39°
5
59°
47°
6
61°
44°
7
65°
40°
8
73°
38°
9
76°
49°
10
68°
58°
11
69°
50°
12
77°
49°
13
79°
57°
14
82°
58°
15
84°
55°
16
85°
53°
17
88°
57°
18
79°
63°
19
76°
60°
20
70°
60°
21
77°
58°
22
74°
58°
23
75°
56°
24
72°
53°
25
77°
52°
26
70°
47°
27
81°
45°
28
76°
41°
29
83°
43°
30
81°
54°
1
76°
53°
2
79°
50°
3
85°
55°
4
86°
57°
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.