S
M
T
W
T
F
S
28
85°
66°
29
84°
67°
30
81°
66°
1
84°
64°
2
81°
66°
3
84°
68°
4
82°
67°
5
81°
68°
6
82°
68°
7
86°
69°
8
88°
69°
9
88°
68°
10
89°
69°
11
87°
68°
12
88°
69°
13
87°
65°
14
84°
63°
15
87°
67°
16
87°
68°
17
82°
66°
18
83°
65°
19
82°
68°
20
81°
68°
21
81°
68°
22
82°
67°
23
82°
66°
24
83°
66°
25
82°
65°
26
85°
68°
27
83°
62°
28
81°
62°
29
83°
63°
30
85°
66°
31
83°
63°
1
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Williamstown
Williamstown's July 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 62° and 69°. The average high for July is 84° with an average low of 66°. 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 Williamstown. See also: August | September | October.
