S
M
T
W
T
F
S
31
75°
54°
1
76°
55°
2
79°
56°
3
78°
55°
4
78°
51°
5
77°
55°
6
79°
54°
7
77°
48°
8
70°
50°
9
71°
57°
10
72°
49°
11
72°
50°
12
71°
50°
13
73°
51°
14
75°
55°
15
79°
55°
16
78°
58°
17
76°
52°
18
74°
57°
19
74°
61°
20
77°
56°
21
78°
53°
22
73°
50°
23
74°
53°
24
75°
53°
25
74°
54°
26
74°
56°
27
77°
57°
28
76°
52°
29
75°
57°
30
76°
61°
1
82°
55°
2
80°
56°
3
76°
56°
4
78°
63°
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 70° to 82°, with overnight lows between 48° and 63°. The average high for June is 76° with an average low of 54°. 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.
