S
M
T
W
T
F
S
31
52°
52°
1
78°
50°
2
75°
54°
3
79°
54°
4
82°
52°
5
86°
55°
6
86°
59°
7
86°
63°
8
79°
64°
9
81°
64°
10
86°
64°
11
91°
70°
12
93°
68°
13
79°
63°
14
88°
59°
15
72°
59°
16
75°
46°
17
86°
55°
18
81°
64°
19
79°
64°
20
84°
68°
21
82°
61°
22
85°
67°
23
73°
58°
24
82°
58°
25
86°
64°
26
79°
67°
27
81°
65°
28
86°
65°
29
90°
69°
30
89°
68°
1
91°
69°
2
90°
68°
3
88°
68°
4
84°
65°
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 73° to 91°, with overnight lows between 58° and 69°. The average high for June is 85° with an average low of 65°. 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.
