S
M
T
W
T
F
S
26
63°
36°
27
73°
38°
28
68°
55°
29
62°
48°
30
53°
39°
1
57°
35°
2
49°
36°
3
57°
36°
4
74°
47°
5
74°
48°
6
49°
44°
7
57°
37°
8
56°
38°
9
63°
37°
10
59°
40°
11
55°
34°
12
60°
33°
13
69°
45°
14
51°
44°
15
64°
44°
16
80°
42°
17
83°
57°
18
89°
65°
19
85°
56°
20
64°
40°
21
58°
38°
22
64°
49°
23
59°
52°
24
61°
47°
25
64°
49°
26
65°
50°
27
65°
49°
28
67°
52°
29
68°
51°
30
66°
52°
31
71°
47°
1
66°
48°
2
66°
52°
3
64°
52°
4
66°
53°
5
65°
53°
6
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Williamstown
Williamstown's May 2026 forecast shows daily high temperatures ranging from 58° to 89°, with overnight lows between 38° and 65°. The average high for May is 67° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Williamstown. See also: June | July | August.
