S
M
T
W
T
F
S
28
85°
69°
29
87°
68°
30
89°
69°
1
88°
70°
2
88°
70°
3
87°
69°
4
89°
70°
5
89°
70°
6
88°
68°
7
85°
70°
8
87°
70°
9
85°
64°
10
88°
66°
11
88°
65°
12
85°
66°
13
84°
63°
14
85°
66°
15
87°
65°
16
88°
64°
17
88°
63°
18
85°
62°
19
87°
67°
20
83°
69°
21
85°
69°
22
Hist. Avg.
86°
66°
23
Hist. Avg.
86°
66°
24
Hist. Avg.
86°
66°
25
Hist. Avg.
86°
66°
26
Hist. Avg.
86°
66°
27
Hist. Avg.
86°
66°
28
Hist. Avg.
86°
66°
29
Hist. Avg.
86°
66°
30
Hist. Avg.
86°
66°
31
Hist. Avg.
86°
66°
1
Hist. Avg.
86°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Williamstown
Williamstown's July 2026 forecast shows daily high temperatures ranging from 83° to 89°, with overnight lows between 62° and 70°. The average high for July is 87° with an average low of 67°. 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.
