S
M
T
W
T
F
S
28
75°
52°
29
80°
53°
30
80°
56°
1
79°
58°
2
80°
60°
3
76°
56°
4
77°
56°
5
76°
55°
6
77°
56°
7
78°
56°
8
79°
58°
9
80°
58°
10
79°
57°
11
74°
58°
12
79°
58°
13
74°
57°
14
74°
58°
15
75°
58°
16
74°
59°
17
74°
59°
18
77°
58°
19
75°
59°
20
77°
58°
21
80°
59°
22
80°
59°
23
78°
58°
24
79°
59°
25
80°
59°
26
80°
58°
27
81°
59°
28
81°
60°
29
79°
59°
30
77°
59°
31
80°
58°
1
81°
60°
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 74° to 81°, with overnight lows between 52° and 60°. The average high for July is 78° 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.
