S
M
T
W
T
F
S
26
64°
48°
27
70°
44°
28
62°
52°
29
58°
45°
30
57°
42°
1
51°
35°
2
51°
28°
3
61°
34°
4
77°
46°
5
57°
43°
6
56°
43°
7
58°
38°
8
59°
41°
9
72°
49°
10
63°
43°
11
67°
39°
12
70°
37°
13
59°
41°
14
66°
39°
15
67°
40°
16
80°
50°
17
85°
59°
18
87°
63°
19
85°
64°
20
63°
52°
21
65°
45°
22
70°
49°
23
62°
55°
24
72°
53°
25
78°
49°
26
76°
55°
27
82°
56°
28
75°
50°
29
77°
53°
30
74°
47°
31
75°
50°
1
76°
51°
2
78°
53°
3
75°
54°
4
76°
56°
5
80°
59°
6
83°
60°
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 74° to 83°, with overnight lows between 47° and 60°. The average high for May is 77° with an average low of 54°. 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.
