S
M
T
W
T
F
S
26
76°
61°
27
81°
62°
28
82°
56°
29
76°
53°
30
74°
53°
31
74°
52°
1
75°
53°
2
76°
54°
3
75°
53°
4
76°
57°
5
76°
58°
6
77°
60°
7
75°
60°
8
78°
59°
9
75°
58°
10
76°
56°
11
77°
53°
12
80°
53°
13
81°
56°
14
81°
56°
15
80°
58°
16
78°
53°
17
79°
51°
18
74°
51°
19
74°
56°
20
77°
58°
21
81°
59°
22
82°
58°
23
83°
59°
24
81°
57°
25
77°
58°
26
81°
50°
27
73°
50°
28
72°
50°
29
Hist. Avg.
78°
60°
30
Hist. Avg.
77°
60°
31
Hist. Avg.
77°
59°
1
Hist. Avg.
77°
59°
2
Hist. Avg.
77°
59°
3
Hist. Avg.
76°
58°
4
Hist. Avg.
76°
58°
5
Hist. Avg.
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Boston
Boston's August 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 50° and 62°. 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 Boston. See also: September | October | November.
