S
M
T
W
T
F
S
26
88°
74°
27
88°
74°
28
89°
73°
29
88°
74°
30
88°
74°
31
89°
73°
1
89°
74°
2
90°
74°
3
91°
73°
4
90°
74°
5
89°
74°
6
90°
73°
7
91°
75°
8
92°
74°
9
92°
75°
10
94°
73°
11
93°
73°
12
92°
72°
13
93°
73°
14
91°
72°
15
92°
73°
16
93°
73°
17
93°
72°
18
92°
73°
19
93°
69°
20
89°
68°
21
89°
69°
22
90°
69°
23
89°
70°
24
88°
69°
25
89°
69°
26
88°
68°
27
88°
68°
28
90°
69°
29
92°
69°
30
92°
70°
31
91°
70°
1
88°
71°
2
89°
70°
3
89°
70°
4
90°
69°
5
89°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harleston
Harleston's August 2026 forecast shows daily high temperatures ranging from 88° to 94°, with overnight lows between 68° and 75°. The average high for August is 90° 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 Harleston. See also: September | October | November.
