S
M
T
W
T
F
S
28
75°
52°
29
80°
53°
30
80°
56°
1
79°
58°
2
80°
60°
3
83°
56°
4
77°
54°
5
79°
53°
6
77°
55°
7
78°
56°
8
79°
58°
9
80°
58°
10
80°
58°
11
80°
59°
12
79°
58°
13
76°
54°
14
74°
52°
15
75°
58°
16
81°
59°
17
79°
59°
18
80°
60°
19
80°
59°
20
79°
59°
21
80°
58°
22
77°
58°
23
81°
59°
24
80°
60°
25
81°
58°
26
76°
55°
27
74°
56°
28
74°
53°
29
77°
58°
30
78°
51°
31
73°
51°
1
72°
52°
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 72° to 83°, with overnight lows between 51° and 60°. The average high for July is 78° with an average low of 56°. 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.
