S
M
T
W
T
F
S
26
83°
62°
27
89°
62°
28
82°
68°
29
80°
64°
30
68°
59°
1
60°
53°
2
71°
48°
3
74°
47°
4
80°
55°
5
81°
67°
6
81°
64°
7
71°
51°
8
71°
54°
9
76°
56°
10
77°
62°
11
78°
60°
12
75°
53°
13
80°
57°
14
81°
57°
15
82°
60°
16
83°
59°
17
80°
63°
18
79°
63°
19
80°
64°
20
79°
64°
21
81°
58°
22
80°
57°
23
78°
57°
24
79°
58°
25
80°
60°
26
80°
58°
27
79°
58°
28
80°
59°
29
82°
63°
30
82°
65°
31
83°
66°
1
83°
66°
2
82°
65°
3
83°
66°
4
83°
67°
5
84°
67°
6
84°
68°
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 71° to 84°, with overnight lows between 47° and 68°. The average high for May is 80° with an average low of 60°. 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.
