S
M
T
W
T
F
S
26
61°
40°
27
72°
55°
28
64°
49°
29
53°
41°
30
53°
36°
1
47°
38°
2
48°
39°
3
50°
40°
4
55°
44°
5
55°
46°
6
59°
47°
7
56°
46°
8
57°
45°
9
58°
47°
10
60°
46°
11
62°
47°
12
66°
52°
13
65°
45°
14
59°
42°
15
60°
43°
16
60°
43°
17
61°
46°
18
63°
53°
19
67°
48°
20
62°
46°
21
62°
45°
22
63°
45°
23
64°
48°
24
66°
56°
25
72°
53°
26
65°
50°
27
65°
49°
28
66°
53°
29
70°
57°
30
75°
57°
31
68°
54°
1
72°
58°
2
76°
60°
3
76°
59°
4
77°
56°
5
67°
54°
6
68°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Williamsville
Williamsville's May 2026 forecast shows daily high temperatures ranging from 47° to 77°, with overnight lows between 36° and 60°. The average high for May is 63° with an average low of 48°. 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 Williamsville. See also: June | July | August.
