S
M
T
W
T
F
S
30
79°
50°
31
79°
53°
1
78°
52°
2
79°
45°
3
77°
42°
4
70°
43°
5
70°
51°
6
74°
50°
7
77°
44°
8
70°
42°
9
69°
44°
10
71°
49°
11
68°
50°
12
76°
50°
13
75°
48°
14
76°
47°
15
74°
40°
16
67°
45°
17
67°
40°
18
66°
39°
19
67°
37°
20
64°
35°
21
62°
38°
22
64°
45°
23
65°
38°
24
65°
37°
25
64°
45°
26
68°
44°
27
69°
45°
28
71°
39°
29
70°
40°
30
60°
39°
1
62°
40°
2
68°
42°
3
60°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marion
Marion's September 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 34° and 53°. The average high for September is 70° with an average low of 43°. 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.
