S
M
T
W
T
F
S
31
77°
42°
1
73°
46°
2
78°
49°
3
84°
44°
4
82°
51°
5
78°
56°
6
72°
56°
7
79°
56°
8
78°
53°
9
83°
53°
10
77°
65°
11
78°
63°
12
74°
60°
13
71°
52°
14
62°
46°
15
69°
45°
16
74°
48°
17
69°
49°
18
63°
55°
19
65°
53°
20
70°
51°
21
71°
49°
22
73°
49°
23
74°
54°
24
71°
53°
25
72°
54°
26
75°
53°
27
76°
56°
28
75°
58°
29
76°
58°
30
78°
57°
1
77°
54°
2
73°
58°
3
73°
56°
4
72°
55°
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 63° to 78°, with overnight lows between 49° and 58°. The average high for June is 73° 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.
