S
M
T
W
T
F
S
31
79°
68°
1
83°
63°
2
83°
57°
3
83°
62°
4
86°
65°
5
87°
67°
6
85°
68°
7
83°
68°
8
84°
69°
9
86°
67°
10
84°
66°
11
86°
68°
12
85°
65°
13
84°
66°
14
85°
64°
15
86°
62°
16
78°
61°
17
77°
61°
18
79°
65°
19
79°
68°
20
80°
68°
21
81°
69°
22
84°
68°
23
81°
66°
24
84°
68°
25
85°
69°
26
87°
70°
27
86°
69°
28
83°
70°
29
82°
68°
30
83°
67°
1
81°
67°
2
82°
71°
3
85°
70°
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 77° to 87°, with overnight lows between 57° and 71°. The average high for June is 83° with an average low of 66°. 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.
