S
M
T
W
T
F
S
26
81°
57°
27
81°
58°
28
82°
58°
29
82°
57°
30
83°
58°
31
81°
64°
1
86°
63°
2
87°
64°
3
87°
64°
4
86°
63°
5
87°
56°
6
83°
56°
7
79°
57°
8
80°
57°
9
81°
59°
10
82°
59°
11
84°
62°
12
85°
57°
13
83°
62°
14
86°
63°
15
85°
63°
16
85°
62°
17
86°
59°
18
83°
56°
19
79°
56°
20
79°
57°
21
80°
58°
22
80°
61°
23
79°
58°
24
81°
58°
25
82°
62°
26
84°
60°
27
84°
55°
28
82°
58°
29
79°
59°
30
83°
60°
31
84°
61°
1
83°
60°
2
83°
59°
3
84°
54°
4
83°
51°
5
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Holliston
Holliston's August 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 51° and 64°. The average high for August is 83° with an average low of 59°. 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 Holliston. See also: September | October | November.
