S
M
T
W
T
F
S
26
78°
60°
27
80°
61°
28
72°
52°
29
71°
51°
30
67°
51°
1
62°
48°
2
62°
44°
3
65°
49°
4
70°
53°
5
69°
52°
6
68°
52°
7
67°
49°
8
68°
48°
9
68°
49°
10
69°
49°
11
70°
56°
12
74°
60°
13
79°
57°
14
71°
53°
15
70°
50°
16
69°
49°
17
69°
50°
18
70°
55°
19
69°
54°
20
70°
52°
21
71°
51°
22
72°
52°
23
73°
57°
24
76°
59°
25
73°
55°
26
72°
53°
27
73°
56°
28
74°
61°
29
74°
62°
30
75°
62°
31
74°
61°
1
73°
62°
2
75°
59°
3
75°
58°
4
78°
61°
5
84°
60°
6
82°
64°
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 62° to 84°, with overnight lows between 44° and 64°. The average high for May is 72° with an average low of 55°. 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.
