S
M
T
W
T
F
S
26
88°
72°
27
88°
72°
28
89°
71°
29
88°
72°
30
88°
73°
31
89°
73°
1
88°
72°
2
88°
73°
3
89°
73°
4
90°
72°
5
89°
72°
6
88°
73°
7
90°
73°
8
89°
72°
9
88°
72°
10
87°
73°
11
85°
73°
12
87°
72°
13
88°
73°
14
89°
72°
15
90°
72°
16
91°
73°
17
91°
73°
18
90°
72°
19
88°
73°
20
89°
71°
21
91°
69°
22
89°
69°
23
89°
71°
24
90°
70°
25
89°
72°
26
90°
71°
27
89°
72°
28
90°
71°
29
89°
70°
30
88°
70°
31
88°
71°
1
89°
71°
2
88°
70°
3
89°
71°
4
89°
70°
5
90°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sumterville
Sumterville's August 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 69° and 73°. The average high for August is 89° with an average low of 72°. 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 Sumterville. See also: September | October | November.