S
M
T
W
T
F
S
26
76°
43°
27
85°
44°
28
84°
60°
29
72°
66°
30
73°
63°
31
83°
57°
1
89°
61°
2
86°
68°
3
79°
63°
4
86°
57°
5
89°
69°
6
90°
72°
7
92°
73°
8
90°
71°
9
91°
66°
10
92°
66°
11
85°
64°
12
84°
61°
13
83°
60°
14
80°
61°
15
79°
60°
16
81°
59°
17
80°
61°
18
80°
61°
19
81°
64°
20
79°
61°
21
79°
59°
22
80°
62°
23
83°
64°
24
85°
64°
25
84°
63°
26
79°
62°
27
78°
62°
28
78°
63°
29
80°
63°
30
83°
62°
31
82°
61°
1
83°
57°
2
76°
55°
3
75°
57°
4
75°
56°
5
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dedham
Dedham's August 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 53° and 73°. 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 Dedham. See also: September | October | November.
