S
M
T
W
T
F
S
26
63°
38°
27
71°
33°
28
70°
36°
29
67°
42°
30
56°
47°
1
63°
37°
2
56°
46°
3
55°
34°
4
70°
32°
5
79°
43°
6
70°
54°
7
62°
38°
8
62°
36°
9
63°
40°
10
70°
51°
11
61°
39°
12
64°
37°
13
66°
41°
14
60°
49°
15
63°
46°
16
76°
43°
17
86°
55°
18
77°
58°
19
88°
61°
20
91°
52°
21
70°
43°
22
64°
47°
23
65°
54°
24
66°
52°
25
71°
53°
26
69°
51°
27
72°
51°
28
74°
55°
29
75°
56°
30
77°
52°
31
70°
56°
1
71°
53°
2
69°
53°
3
68°
54°
4
69°
57°
5
71°
57°
6
76°
56°
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 64° to 91°, with overnight lows between 43° and 61°. The average high for May is 73° 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.
