S
M
T
W
T
F
S
26
80°
45°
27
69°
59°
28
62°
53°
29
61°
43°
30
63°
37°
1
60°
41°
2
59°
41°
3
73°
42°
4
78°
56°
5
59°
47°
6
61°
40°
7
68°
39°
8
66°
50°
9
79°
51°
10
70°
47°
11
74°
43°
12
83°
50°
13
73°
48°
14
73°
42°
15
80°
52°
16
73°
66°
17
88°
69°
18
78°
70°
19
77°
52°
20
65°
46°
21
67°
50°
22
74°
53°
23
77°
59°
24
79°
61°
25
76°
59°
26
78°
61°
27
81°
59°
28
79°
58°
29
80°
57°
30
79°
62°
31
82°
61°
1
83°
62°
2
82°
62°
3
75°
57°
4
75°
55°
5
76°
62°
6
81°
63°
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 65° to 88°, with overnight lows between 46° and 70°. The average high for May is 78° 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 Williamsville. See also: June | July | August.
