S
M
T
W
T
F
S
31
76°
49°
1
79°
56°
2
73°
50°
3
80°
43°
4
86°
46°
5
89°
50°
6
90°
60°
7
90°
68°
8
88°
63°
9
84°
65°
10
86°
66°
11
91°
66°
12
95°
65°
13
92°
67°
14
90°
66°
15
86°
63°
16
84°
64°
17
79°
63°
18
85°
66°
19
86°
60°
20
82°
63°
21
86°
64°
22
86°
64°
23
84°
63°
24
87°
63°
25
88°
64°
26
89°
65°
27
89°
65°
28
88°
64°
29
87°
63°
30
89°
65°
1
89°
66°
2
88°
66°
3
90°
65°
4
89°
66°
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 79° to 95°, with overnight lows between 60° and 68°. The average high for June is 87° with an average low of 64°. 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.
