S
M
T
W
T
F
S
26
80°
58°
27
81°
59°
28
81°
60°
29
79°
59°
30
77°
59°
31
80°
58°
1
81°
60°
2
82°
59°
3
82°
56°
4
81°
58°
5
76°
58°
6
82°
56°
7
80°
57°
8
79°
58°
9
81°
55°
10
81°
56°
11
80°
55°
12
80°
56°
13
78°
56°
14
80°
53°
15
74°
50°
16
73°
49°
17
75°
52°
18
74°
50°
19
75°
48°
20
76°
49°
21
74°
52°
22
78°
54°
23
79°
55°
24
80°
54°
25
79°
49°
26
80°
52°
27
78°
50°
28
71°
54°
29
74°
54°
30
79°
48°
31
78°
46°
1
75°
44°
2
69°
46°
3
70°
45°
4
69°
45°
5
69°
44°
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 82°, with overnight lows between 44° and 60°. The average high for August is 77° with an average low of 53°. 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.
