S
M
T
W
T
F
S
31
82°
65°
1
81°
63°
2
85°
58°
3
81°
60°
4
86°
62°
5
87°
66°
6
87°
66°
7
84°
65°
8
81°
65°
9
83°
64°
10
84°
65°
11
83°
62°
12
82°
64°
13
84°
63°
14
87°
66°
15
86°
61°
16
78°
60°
17
78°
60°
18
79°
64°
19
79°
67°
20
80°
67°
21
81°
68°
22
84°
67°
23
82°
65°
24
84°
67°
25
85°
68°
26
87°
69°
27
84°
68°
28
83°
69°
29
83°
67°
30
84°
66°
1
81°
66°
2
83°
70°
3
85°
69°
4
83°
64°
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 78° to 87°, with overnight lows between 58° and 70°. The average high for June is 83° 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.
