S
M
T
W
T
F
S
26
84°
57°
27
84°
63°
28
77°
64°
29
73°
61°
30
68°
52°
1
66°
46°
2
70°
43°
3
73°
39°
4
81°
48°
5
73°
55°
6
72°
54°
7
68°
50°
8
75°
46°
9
82°
54°
10
82°
57°
11
75°
54°
12
81°
46°
13
82°
58°
14
75°
48°
15
82°
50°
16
84°
64°
17
88°
59°
18
90°
72°
19
90°
72°
20
81°
66°
21
77°
66°
22
82°
68°
23
84°
68°
24
82°
68°
25
77°
68°
26
84°
68°
27
88°
69°
28
83°
69°
29
77°
67°
30
82°
66°
31
85°
66°
1
86°
61°
2
84°
57°
3
85°
62°
4
83°
61°
5
82°
65°
6
81°
63°
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 77° to 88°, with overnight lows between 57° and 69°. The average high for May is 83° with an average low of 64°. 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.
