S
M
T
W
T
F
S
26
85°
64°
27
84°
63°
28
83°
61°
29
83°
61°
30
81°
57°
31
78°
58°
1
76°
58°
2
74°
61°
3
81°
61°
4
81°
60°
5
78°
60°
6
77°
59°
7
75°
56°
8
74°
59°
9
74°
58°
10
74°
61°
11
80°
61°
12
81°
57°
13
80°
58°
14
81°
60°
15
80°
59°
16
83°
52°
17
76°
50°
18
72°
49°
19
71°
50°
20
72°
51°
21
73°
51°
22
73°
52°
23
74°
51°
24
73°
57°
25
76°
58°
26
78°
50°
27
71°
50°
28
70°
51°
29
76°
56°
30
78°
57°
31
77°
48°
1
71°
47°
2
69°
49°
3
70°
55°
4
75°
51°
5
77°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dorchester
Dorchester's August 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 46° and 64°. The average high for August is 77° with an average low of 56°. 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 Dorchester. See also: September | October | November.
