S
M
T
W
T
F
S
31
72°
36°
1
64°
46°
2
77°
40°
3
84°
50°
4
87°
51°
5
89°
55°
6
87°
59°
7
82°
62°
8
79°
53°
9
84°
56°
10
87°
60°
11
94°
68°
12
94°
74°
13
88°
66°
14
91°
62°
15
77°
51°
16
76°
55°
17
76°
62°
18
77°
62°
19
81°
59°
20
79°
57°
21
77°
58°
22
76°
58°
23
79°
60°
24
78°
60°
25
77°
58°
26
76°
60°
27
77°
56°
28
76°
57°
29
77°
57°
30
76°
58°
1
77°
57°
2
78°
60°
3
78°
64°
4
79°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Collinsville
Collinsville's June 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 51° and 64°. The average high for June is 78° with an average low of 59°. 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 Collinsville. See also: July | August | September.
