S
M
T
W
T
F
S
26
77°
59°
27
79°
56°
28
76°
54°
29
72°
58°
30
77°
58°
31
74°
59°
1
77°
58°
2
79°
54°
3
74°
53°
4
73°
52°
5
74°
53°
6
74°
53°
7
77°
52°
8
73°
52°
9
77°
53°
10
78°
58°
11
79°
54°
12
79°
58°
13
78°
60°
14
81°
60°
15
79°
53°
16
80°
50°
17
72°
50°
18
71°
52°
19
71°
52°
20
70°
51°
21
69°
51°
22
72°
57°
23
71°
58°
24
78°
57°
25
80°
51°
26
79°
48°
27
70°
47°
28
69°
47°
29
69°
51°
30
70°
56°
31
76°
57°
1
76°
56°
2
77°
52°
3
75°
49°
4
74°
53°
5
75°
49°
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 69° to 81°, with overnight lows between 47° and 60°. The average high for August is 75° with an average low of 54°. 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.
