S
M
T
W
T
F
S
26
80°
59°
27
85°
57°
28
64°
48°
29
64°
45°
30
66°
40°
1
64°
44°
2
63°
40°
3
78°
41°
4
79°
61°
5
65°
44°
6
62°
44°
7
67°
38°
8
77°
49°
9
81°
51°
10
72°
46°
11
76°
43°
12
78°
49°
13
76°
51°
14
77°
48°
15
83°
61°
16
88°
69°
17
84°
66°
18
85°
73°
19
69°
55°
20
61°
55°
21
71°
60°
22
69°
58°
23
76°
60°
24
77°
61°
25
77°
60°
26
77°
63°
27
82°
62°
28
79°
62°
29
80°
61°
30
79°
60°
31
79°
61°
1
80°
58°
2
82°
61°
3
77°
59°
4
76°
57°
5
82°
62°
6
83°
63°
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 61° to 83°, with overnight lows between 55° and 63°. The average high for May is 77° 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 Buffalo. See also: June | July | August.
