S
M
T
W
T
F
S
26
88°
72°
27
86°
75°
28
88°
75°
29
77°
64°
30
64°
59°
1
59°
54°
2
75°
48°
3
81°
48°
4
81°
55°
5
86°
68°
6
75°
57°
7
68°
52°
8
79°
59°
9
90°
70°
10
88°
64°
11
79°
63°
12
84°
55°
13
88°
55°
14
90°
61°
15
86°
68°
16
88°
70°
17
86°
75°
18
89°
76°
19
81°
67°
20
79°
66°
21
79°
66°
22
80°
67°
23
79°
66°
24
82°
67°
25
83°
69°
26
81°
68°
27
84°
69°
28
84°
68°
29
82°
67°
30
83°
68°
31
85°
66°
1
86°
69°
2
88°
68°
3
84°
66°
4
83°
64°
5
83°
68°
6
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Buffalo
Buffalo's May 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 64° and 76°. The average high for May is 83° with an average low of 68°. 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 Buffalo. See also: June | July | August.
