S
M
T
W
T
F
S
31
93°
70°
1
87°
72°
2
88°
65°
3
88°
64°
4
88°
63°
5
87°
71°
6
87°
70°
7
86°
71°
8
87°
70°
9
86°
68°
10
87°
70°
11
90°
70°
12
88°
69°
13
87°
70°
14
86°
66°
15
88°
70°
16
87°
70°
17
84°
69°
18
83°
70°
19
85°
70°
20
85°
71°
21
87°
71°
22
89°
70°
23
85°
70°
24
85°
68°
25
86°
69°
26
88°
71°
27
87°
70°
28
85°
71°
29
86°
72°
30
85°
71°
1
86°
72°
2
87°
72°
3
90°
71°
4
90°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Charleston
Charleston's June 2026 forecast shows daily high temperatures ranging from 83° to 90°, with overnight lows between 63° and 72°. The average high for June is 87° with an average low of 70°. 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 Charleston. See also: July | August | September.
