S
M
T
W
T
F
S
26
93°
73°
27
94°
74°
28
93°
73°
29
94°
72°
30
93°
73°
31
93°
73°
1
92°
72°
2
86°
72°
3
87°
71°
4
88°
72°
5
89°
72°
6
88°
71°
7
88°
72°
8
89°
72°
9
90°
71°
10
90°
71°
11
88°
70°
12
88°
71°
13
87°
70°
14
92°
69°
15
90°
70°
16
92°
69°
17
88°
68°
18
89°
69°
19
92°
70°
20
92°
65°
21
87°
65°
22
87°
66°
23
86°
64°
24
86°
64°
25
87°
65°
26
88°
64°
27
91°
65°
28
92°
67°
29
92°
69°
30
91°
69°
31
92°
68°
1
91°
68°
2
90°
67°
3
90°
67°
4
89°
63°
5
89°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Williamstown
Williamstown's August 2026 forecast shows daily high temperatures ranging from 86° to 94°, with overnight lows between 63° and 74°. The average high for August is 90° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Williamstown. See also: September | October | November.
