S
M
T
W
T
F
S
26
78°
60°
27
80°
61°
28
72°
52°
29
71°
51°
30
67°
51°
1
65°
48°
2
67°
46°
3
68°
50°
4
67°
52°
5
75°
56°
6
70°
50°
7
71°
51°
8
76°
57°
9
75°
58°
10
78°
58°
11
78°
60°
12
77°
60°
13
79°
57°
14
70°
51°
15
71°
52°
16
73°
58°
17
80°
61°
18
79°
60°
19
78°
51°
20
70°
50°
21
70°
52°
22
71°
53°
23
73°
53°
24
78°
60°
25
82°
62°
26
82°
62°
27
81°
61°
28
74°
62°
29
77°
62°
30
80°
63°
31
78°
60°
1
82°
61°
2
79°
60°
3
77°
59°
4
78°
56°
5
77°
58°
6
82°
59°
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 65° to 82°, with overnight lows between 46° and 63°. The average high for May is 75° with an average low of 56°. 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.
