S
M
T
W
T
F
S
31
82°
54°
1
82°
59°
2
77°
53°
3
79°
54°
4
83°
60°
5
85°
60°
6
84°
62°
7
83°
63°
8
85°
63°
9
83°
61°
10
84°
62°
11
84°
62°
12
83°
64°
13
82°
64°
14
84°
63°
15
82°
59°
16
81°
62°
17
79°
61°
18
78°
62°
19
78°
62°
20
78°
63°
21
79°
63°
22
80°
62°
23
84°
63°
24
80°
61°
25
80°
63°
26
81°
62°
27
83°
63°
28
81°
64°
29
81°
59°
30
80°
58°
1
80°
58°
2
81°
63°
3
81°
65°
4
82°
64°
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 85°, with overnight lows between 53° and 65°. The average high for June is 81° with an average low of 61°. 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.
