S
M
T
W
T
F
S
26
72°
60°
27
77°
59°
28
85°
65°
29
69°
65°
30
73°
63°
31
75°
66°
1
85°
69°
2
86°
71°
3
80°
71°
4
87°
66°
5
87°
71°
6
90°
73°
7
93°
72°
8
92°
73°
9
93°
68°
10
91°
70°
11
87°
66°
12
83°
65°
13
84°
62°
14
84°
63°
15
78°
62°
16
80°
61°
17
79°
63°
18
79°
63°
19
80°
66°
20
79°
63°
21
79°
61°
22
78°
64°
23
82°
66°
24
84°
66°
25
83°
65°
26
78°
64°
27
78°
64°
28
77°
66°
29
80°
64°
30
82°
65°
31
81°
64°
1
83°
60°
2
75°
58°
3
74°
60°
4
75°
58°
5
75°
56°
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 74° to 93°, with overnight lows between 56° and 73°. The average high for August is 82° with an average low of 64°. 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.
