S
M
T
W
T
F
S
30
75°
64°
31
85°
70°
1
87°
73°
2
91°
71°
3
91°
69°
4
76°
66°
5
77°
60°
6
76°
55°
7
77°
54°
8
84°
56°
9
87°
69°
10
80°
61°
11
77°
57°
12
74°
60°
13
82°
62°
14
67°
51°
15
83°
53°
16
82°
68°
17
76°
68°
18
73°
59°
19
69°
61°
20
69°
62°
21
63°
57°
22
64°
57°
23
66°
56°
24
69°
46°
25
66°
56°
26
69°
58°
27
71°
60°
28
69°
56°
29
72°
60°
30
74°
61°
1
75°
59°
2
72°
55°
3
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Vermilion
Vermilion's September 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 55° and 61°. The average high for September is 71° with an average low of 58°. 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 Vermilion. See also: October | November | December.
