S
M
T
W
T
F
S
30
87°
70°
31
83°
71°
1
84°
71°
2
84°
70°
3
85°
70°
4
87°
69°
5
88°
70°
6
89°
71°
7
89°
71°
8
88°
70°
9
88°
70°
10
87°
71°
11
88°
71°
12
88°
70°
13
87°
69°
14
87°
68°
15
86°
68°
16
85°
67°
17
81°
68°
18
84°
68°
19
84°
67°
20
86°
67°
21
81°
65°
22
81°
64°
23
86°
63°
24
85°
64°
25
80°
62°
26
84°
61°
27
85°
60°
28
86°
62°
29
86°
62°
30
85°
61°
1
85°
61°
2
82°
62°
3
83°
61°
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 80° to 89°, with overnight lows between 60° and 71°. The average high for September is 85° with an average low of 67°. 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.
