S
M
T
W
T
F
S
1
82°
62°
2
83°
60°
3
87°
61°
4
81°
70°
5
86°
71°
6
91°
70°
7
91°
75°
8
85°
68°
9
86°
70°
10
87°
71°
11
89°
68°
12
89°
71°
13
90°
71°
14
83°
73°
15
83°
72°
16
89°
71°
17
88°
71°
18
90°
71°
19
90°
70°
20
90°
71°
21
93°
71°
22
92°
72°
23
92°
72°
24
94°
70°
25
96°
71°
26
87°
70°
27
90°
71°
28
90°
71°
29
89°
70°
30
92°
70°
1
88°
72°
2
88°
73°
3
92°
72°
4
92°
73°
5
90°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Sumter
Sumter's June 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for June is ° with an average low of °. 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.