S
M
T
W
T
F
S
26
83°
59°
27
83°
59°
28
82°
58°
29
83°
59°
30
83°
59°
31
82°
58°
1
81°
60°
2
82°
59°
3
82°
59°
4
81°
58°
5
78°
54°
6
79°
55°
7
82°
58°
8
82°
51°
9
75°
51°
10
75°
50°
11
76°
55°
12
75°
53°
13
76°
57°
14
76°
58°
15
79°
58°
16
80°
57°
17
76°
50°
18
75°
48°
19
75°
53°
20
78°
54°
21
75°
54°
22
78°
50°
23
80°
51°
24
78°
48°
25
74°
47°
26
76°
48°
27
74°
47°
28
72°
47°
29
77°
50°
30
79°
53°
31
80°
53°
1
80°
54°
2
79°
53°
3
80°
46°
4
77°
43°
5
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South Dorset
South Dorset's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 43° and 60°. The average high for August is 78° with an average low of 53°. 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 South Dorset. See also: September | October | November.