S
M
T
W
T
F
S
30
80°
55°
31
81°
57°
1
80°
57°
2
80°
56°
3
80°
48°
4
73°
46°
5
72°
50°
6
73°
56°
7
79°
56°
8
79°
55°
9
75°
50°
10
73°
54°
11
78°
53°
12
77°
55°
13
78°
55°
14
77°
54°
15
78°
53°
16
77°
52°
17
72°
52°
18
76°
46°
19
69°
44°
20
68°
43°
21
65°
42°
22
66°
50°
23
68°
47°
24
67°
43°
25
65°
42°
26
66°
49°
27
71°
48°
28
72°
49°
29
71°
48°
30
70°
47°
1
63°
48°
2
68°
40°
3
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Vandalia
Vandalia's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 40° and 57°. The average high for September is 73° with an average low of 50°. 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 Vandalia. See also: October | November | December.
