S
M
T
W
T
F
S
31
78°
53°
1
74°
50°
2
76°
46°
3
82°
46°
4
86°
54°
5
79°
68°
6
89°
70°
7
84°
65°
8
81°
65°
9
88°
71°
10
89°
67°
11
80°
65°
12
81°
58°
13
82°
61°
14
71°
52°
15
76°
48°
16
76°
57°
17
70°
53°
18
72°
60°
19
76°
56°
20
77°
58°
21
69°
57°
22
77°
52°
23
76°
58°
24
78°
60°
25
78°
59°
26
76°
60°
27
79°
64°
28
86°
70°
29
86°
70°
30
85°
69°
1
88°
69°
2
87°
67°
3
86°
66°
4
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in St. Charles
St. Charles's June 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 52° and 70°. The average high for June is 82° 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 St. Charles. See also: July | August | September.
