S
M
T
W
T
F
S
31
79°
68°
1
85°
66°
2
80°
64°
3
82°
56°
4
84°
62°
5
86°
70°
6
88°
72°
7
88°
73°
8
79°
71°
9
91°
74°
10
94°
73°
11
89°
68°
12
89°
69°
13
86°
67°
14
79°
60°
15
81°
62°
16
81°
62°
17
82°
64°
18
82°
66°
19
85°
65°
20
81°
67°
21
84°
69°
22
81°
69°
23
82°
67°
24
85°
69°
25
88°
70°
26
88°
71°
27
87°
70°
28
84°
64°
29
84°
70°
30
83°
71°
1
83°
71°
2
84°
70°
3
86°
70°
4
83°
65°
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 79° to 94°, with overnight lows between 60° and 74°. The average high for June is 85° with an average low of 68°. 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.
