S
M
T
W
T
F
S
30
83°
69°
31
86°
69°
1
95°
72°
2
96°
74°
3
88°
74°
4
93°
74°
5
81°
70°
6
77°
63°
7
78°
59°
8
N/A
9
81°
64°
10
79°
55°
11
80°
64°
12
81°
63°
13
77°
66°
14
80°
66°
15
72°
56°
16
70°
55°
17
73°
56°
18
70°
51°
19
66°
50°
20
70°
52°
21
69°
51°
22
71°
50°
23
69°
55°
24
75°
56°
25
70°
55°
26
75°
56°
27
74°
55°
28
74°
55°
29
73°
54°
30
72°
52°
1
70°
48°
2
65°
53°
3
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Vernon Hills
Vernon Hills's September 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 48° and 66°. The average high for September is 73° 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 Vernon Hills. See also: October | November | December.
