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°
68°
8
81°
69°
9
88°
72°
10
93°
72°
11
88°
61°
12
83°
63°
13
82°
64°
14
75°
57°
15
74°
56°
16
73°
55°
17
76°
59°
18
79°
61°
19
78°
61°
20
82°
60°
21
81°
64°
22
77°
64°
23
79°
63°
24
84°
66°
25
85°
66°
26
85°
67°
27
84°
61°
28
78°
60°
29
78°
64°
30
83°
66°
1
82°
66°
2
80°
65°
3
85°
62°
4
80°
61°
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 73° to 93°, with overnight lows between 55° and 72°. The average high for June is 81° with an average low of 63°. 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.
