S
M
T
W
T
F
S
26
87°
63°
27
88°
72°
28
87°
73°
29
77°
63°
30
66°
57°
1
58°
54°
2
73°
50°
3
80°
46°
4
80°
56°
5
80°
64°
6
80°
54°
7
73°
52°
8
75°
57°
9
73°
62°
10
83°
66°
11
75°
59°
12
81°
52°
13
85°
53°
14
85°
59°
15
90°
62°
16
86°
70°
17
88°
68°
18
88°
75°
19
88°
66°
20
80°
66°
21
78°
69°
22
86°
69°
23
78°
67°
24
85°
65°
25
86°
67°
26
87°
67°
27
84°
71°
28
79°
67°
29
85°
69°
30
89°
69°
31
86°
68°
1
89°
65°
2
87°
62°
3
84°
63°
4
81°
64°
5
84°
64°
6
82°
64°
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 79° to 89°, with overnight lows between 62° and 71°. The average high for May is 85° with an average low of 66°. 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.
