S
M
T
W
T
F
S
28
78°
56°
29
77°
56°
30
77°
57°
1
78°
56°
2
78°
58°
3
79°
62°
4
79°
61°
5
78°
58°
6
79°
60°
7
80°
64°
8
85°
65°
9
86°
61°
10
79°
60°
11
80°
61°
12
82°
64°
13
81°
61°
14
80°
59°
15
81°
63°
16
81°
64°
17
82°
64°
18
81°
61°
19
79°
64°
20
80°
65°
21
82°
65°
22
79°
64°
23
80°
63°
24
80°
62°
25
81°
61°
26
81°
61°
27
82°
64°
28
83°
62°
29
83°
62°
30
85°
63°
31
86°
64°
1
85°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Holliston
Holliston's July 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 56° and 65°. The average high for July is 81° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Holliston. See also: August | September | October.
