S
M
T
W
T
F
S
26
101°
75°
27
99°
79°
28
94°
71°
29
89°
77°
30
87°
69°
31
80°
66°
1
84°
63°
2
86°
59°
3
88°
64°
4
75°
63°
5
76°
61°
6
79°
65°
7
91°
63°
8
84°
64°
9
90°
72°
10
93°
73°
11
95°
75°
12
92°
73°
13
87°
72°
14
86°
71°
15
87°
74°
16
81°
65°
17
86°
62°
18
85°
65°
19
80°
63°
20
85°
61°
21
88°
65°
22
86°
64°
23
77°
62°
24
86°
65°
25
88°
63°
26
82°
61°
27
80°
60°
28
81°
61°
29
78°
59°
30
80°
61°
31
81°
62°
1
82°
61°
2
83°
62°
3
82°
58°
4
76°
62°
5
76°
63°
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 76° to 88°, with overnight lows between 58° and 65°. The average high for August is 82° with an average low of 62°. 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.
