S
M
T
W
T
F
S
26
56°
37°
27
52°
36°
28
54°
37°
29
55°
37°
30
60°
38°
1
55°
38°
2
58°
36°
3
57°
33°
4
57°
36°
5
61°
41°
6
66°
40°
7
58°
40°
8
58°
41°
9
63°
41°
10
59°
42°
11
67°
42°
12
67°
43°
13
68°
44°
14
68°
45°
15
63°
36°
16
63°
35°
17
65°
37°
18
64°
38°
19
63°
38°
20
68°
37°
21
62°
45°
22
70°
46°
23
70°
47°
24
71°
47°
25
70°
46°
26
65°
43°
27
68°
43°
28
71°
44°
29
68°
44°
30
66°
45°
31
72°
46°
1
73°
50°
2
70°
50°
3
74°
49°
4
74°
50°
5
75°
50°
6
73°
51°
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 52° to 75°, with overnight lows between 33° and 51°. The average high for May is 65° with an average low of 42°. 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.
