S
M
T
W
T
F
S
30
77°
64°
31
79°
63°
1
81°
62°
2
74°
59°
3
73°
58°
4
74°
60°
5
77°
61°
6
80°
62°
7
81°
63°
8
81°
63°
9
80°
62°
10
80°
61°
11
79°
61°
12
81°
62°
13
81°
62°
14
76°
51°
15
68°
54°
16
71°
55°
17
73°
56°
18
68°
51°
19
69°
48°
20
69°
50°
21
75°
55°
22
76°
56°
23
76°
47°
24
68°
49°
25
69°
52°
26
74°
56°
27
73°
54°
28
75°
46°
29
66°
45°
30
65°
47°
1
64°
50°
2
72°
50°
3
73°
52°
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 64° to 81°, with overnight lows between 45° and 64°. The average high for September is 74° with an average low of 56°. 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.
