S
M
T
W
T
F
S
26
90°
72°
27
88°
72°
28
89°
71°
29
88°
72°
30
88°
72°
31
89°
68°
1
87°
67°
2
87°
70°
3
88°
72°
4
88°
72°
5
89°
70°
6
88°
71°
7
90°
72°
8
87°
71°
9
90°
72°
10
91°
71°
11
89°
71°
12
89°
70°
13
88°
68°
14
89°
69°
15
92°
70°
16
92°
71°
17
91°
71°
18
92°
70°
19
91°
66°
20
89°
66°
21
86°
67°
22
86°
65°
23
87°
65°
24
86°
66°
25
86°
65°
26
87°
65°
27
86°
66°
28
86°
65°
29
90°
65°
30
90°
66°
31
88°
66°
1
89°
68°
2
90°
65°
3
86°
64°
4
85°
65°
5
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sumter Southeast
Sumter Southeast's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 64° and 72°. The average high for August is 88° 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 August weather will actually feel in Sumter Southeast. See also: September | October | November.
