S
M
T
W
T
F
S
26
86°
62°
27
86°
64°
28
87°
63°
29
87°
60°
30
86°
59°
31
81°
57°
1
82°
57°
2
81°
58°
3
82°
57°
4
81°
59°
5
83°
63°
6
84°
61°
7
83°
63°
8
86°
63°
9
83°
64°
10
84°
63°
11
82°
61°
12
86°
63°
13
87°
62°
14
86°
62°
15
86°
57°
16
85°
60°
17
80°
55°
18
82°
55°
19
81°
56°
20
80°
59°
21
82°
61°
22
85°
63°
23
86°
62°
24
85°
58°
25
85°
56°
26
85°
60°
27
78°
56°
28
77°
55°
29
Hist. Avg.
82°
58°
30
Hist. Avg.
82°
58°
31
Hist. Avg.
82°
57°
1
Hist. Avg.
82°
57°
2
Hist. Avg.
82°
57°
3
Hist. Avg.
81°
56°
4
Hist. Avg.
81°
56°
5
Hist. Avg.
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Holliston
Holliston's August 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 55° and 64°. The average high for August is 84° with an average low of 60°. 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.
