S
M
T
W
T
F
S
31
88°
60°
1
87°
64°
2
88°
64°
3
89°
65°
4
89°
66°
5
85°
65°
6
87°
60°
7
86°
60°
8
83°
62°
9
83°
65°
10
84°
64°
11
87°
65°
12
85°
66°
13
86°
64°
14
87°
64°
15
87°
65°
16
85°
64°
17
84°
64°
18
86°
66°
19
86°
68°
20
87°
63°
21
85°
63°
22
86°
64°
23
86°
68°
24
90°
69°
25
90°
70°
26
92°
68°
27
90°
65°
28
87°
66°
29
86°
65°
30
85°
66°
1
88°
66°
2
87°
68°
3
88°
69°
4
90°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Sumter
Sumter's June 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 60° and 70°. The average high for June is 87° with an average low of 65°. 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 Sumter. See also: July | August | September.
