S
M
T
W
T
F
S
26
70°
32°
27
75°
36°
28
71°
38°
29
68°
40°
30
52°
44°
1
57°
36°
2
50°
35°
3
50°
31°
4
69°
31°
5
82°
42°
6
55°
45°
7
58°
37°
8
54°
32°
9
57°
30°
10
67°
43°
11
57°
34°
12
55°
31°
13
48°
33°
14
57°
46°
15
67°
51°
16
78°
52°
17
80°
53°
18
83°
48°
19
85°
56°
20
81°
44°
21
62°
36°
22
66°
38°
23
66°
44°
24
59°
47°
25
68°
50°
26
75°
51°
27
76°
50°
28
75°
47°
29
77°
50°
30
74°
51°
31
75°
50°
1
79°
51°
2
80°
48°
3
77°
52°
4
78°
51°
5
79°
53°
6
77°
53°
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 59° to 81°, with overnight lows between 36° and 53°. The average high for May is 74° with an average low of 48°. 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.
