S
M
T
W
T
F
S
26
70°
59°
27
66°
59°
28
70°
61°
29
73°
59°
30
72°
59°
1
81°
59°
2
70°
59°
3
72°
54°
4
63°
55°
5
61°
52°
6
61°
50°
7
73°
46°
8
73°
52°
9
75°
57°
10
72°
52°
11
68°
48°
12
64°
52°
13
64°
54°
14
59°
52°
15
59°
50°
16
63°
48°
17
63°
54°
18
68°
54°
19
79°
54°
20
75°
61°
21
95°
59°
22
99°
63°
23
82°
64°
24
82°
63°
25
97°
72°
26
97°
68°
27
N/A
28
101°
62°
29
79°
63°
30
75°
59°
31
75°
58°
1
83°
63°
2
74°
58°
3
79°
57°
4
74°
59°
5
73°
58°
6
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Bilbao
Bilbao's May 2026 forecast shows daily high temperatures ranging from 73° to 101°, with overnight lows between 57° and 63°. The average high for May is 79° 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 Bilbao. See also: June | July | August.
