S
M
T
W
T
F
S
31
84°
69°
1
84°
57°
2
83°
58°
3
84°
62°
4
84°
65°
5
81°
66°
6
81°
65°
7
81°
64°
8
84°
65°
9
85°
64°
10
87°
66°
11
85°
63°
12
82°
62°
13
81°
62°
14
82°
60°
15
79°
55°
16
74°
56°
17
74°
58°
18
73°
57°
19
75°
59°
20
76°
64°
21
81°
65°
22
78°
64°
23
82°
64°
24
85°
66°
25
84°
66°
26
86°
65°
27
82°
66°
28
81°
67°
29
81°
66°
30
80°
67°
1
82°
67°
2
84°
68°
3
87°
65°
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 87°, with overnight lows between 55° and 68°. 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.
