S
M
T
W
T
F
S
26
82°
55°
27
82°
55°
28
73°
64°
29
82°
63°
30
70°
54°
1
67°
51°
2
71°
44°
3
73°
45°
4
79°
53°
5
81°
63°
6
74°
54°
7
70°
45°
8
72°
47°
9
73°
55°
10
76°
54°
11
78°
58°
12
81°
56°
13
81°
57°
14
80°
56°
15
81°
61°
16
82°
61°
17
83°
60°
18
82°
62°
19
82°
62°
20
83°
61°
21
84°
62°
22
84°
63°
23
83°
63°
24
78°
62°
25
82°
63°
26
83°
64°
27
80°
63°
28
79°
59°
29
83°
63°
30
84°
61°
31
82°
63°
1
85°
64°
2
86°
65°
3
86°
65°
4
87°
64°
5
81°
65°
6
81°
62°
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 67° to 87°, with overnight lows between 44° and 65°. The average high for May is 80° with an average low of 59°. 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.
