S
M
T
W
T
F
S
26
57°
40°
27
68°
46°
28
64°
51°
29
56°
39°
30
54°
36°
1
49°
33°
2
56°
30°
3
69°
46°
4
81°
44°
5
61°
48°
6
57°
38°
7
58°
36°
8
65°
36°
9
74°
45°
10
65°
39°
11
53°
38°
12
69°
37°
13
58°
40°
14
65°
38°
15
75°
48°
16
83°
63°
17
85°
58°
18
79°
71°
19
77°
49°
20
56°
45°
21
59°
50°
22
62°
51°
23
67°
52°
24
71°
55°
25
77°
58°
26
76°
60°
27
75°
57°
28
75°
58°
29
74°
54°
30
76°
59°
31
73°
53°
1
74°
58°
2
76°
57°
3
69°
53°
4
68°
52°
5
70°
58°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Vernon Hills
Vernon Hills's May 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 45° and 71°. The average high for May is 72° 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 May weather will actually feel in Vernon Hills. See also: June | July | August.
