S
M
T
W
T
F
S
28
74°
53°
29
79°
55°
30
81°
59°
1
80°
60°
2
83°
62°
3
77°
59°
4
76°
56°
5
78°
57°
6
76°
55°
7
74°
53°
8
78°
57°
9
80°
58°
10
73°
58°
11
74°
57°
12
77°
59°
13
75°
59°
14
76°
58°
15
76°
59°
16
74°
59°
17
75°
58°
18
75°
59°
19
74°
58°
20
76°
57°
21
79°
59°
22
77°
59°
23
75°
58°
24
75°
59°
25
77°
59°
26
78°
58°
27
80°
60°
28
80°
60°
29
77°
59°
30
77°
60°
31
80°
60°
1
81°
59°
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 73° to 83°, with overnight lows between 53° and 62°. The average high for July is 77° with an average low of 58°. 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.
