S
M
T
W
T
F
S
31
65°
45°
1
73°
50°
2
75°
48°
3
80°
57°
4
86°
65°
5
83°
66°
6
79°
66°
7
81°
63°
8
80°
62°
9
82°
63°
10
80°
65°
11
82°
62°
12
77°
61°
13
79°
62°
14
78°
57°
15
72°
53°
16
71°
54°
17
72°
54°
18
74°
59°
19
77°
59°
20
78°
62°
21
76°
60°
22
79°
64°
23
80°
63°
24
80°
62°
25
78°
64°
26
84°
65°
27
83°
60°
28
76°
58°
29
76°
59°
30
77°
58°
1
81°
65°
2
84°
66°
3
83°
66°
4
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Grayslake
Grayslake's June 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 48° and 66°. The average high for June is 79° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Grayslake. See also: July | August | September.
