S
M
T
W
T
F
S
26
74°
45°
27
74°
49°
28
60°
46°
29
59°
39°
30
55°
35°
1
55°
35°
2
60°
32°
3
76°
47°
4
80°
45°
5
60°
39°
6
54°
36°
7
63°
44°
8
66°
43°
9
73°
49°
10
62°
43°
11
64°
41°
12
70°
51°
13
72°
48°
14
70°
47°
15
72°
51°
16
76°
53°
17
72°
49°
18
74°
54°
19
75°
52°
20
73°
54°
21
69°
46°
22
66°
45°
23
67°
46°
24
69°
46°
25
68°
47°
26
68°
47°
27
69°
48°
28
70°
48°
29
71°
54°
30
73°
58°
31
74°
55°
1
73°
53°
2
77°
57°
3
77°
58°
4
80°
59°
5
80°
61°
6
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lisbon
Lisbon's May 2026 forecast shows daily high temperatures ranging from 54° to 80°, with overnight lows between 36° and 61°. The average high for May is 71° with an average low of 50°. 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 Lisbon. See also: June | July | August.
