S
M
T
W
T
F
S
26
73°
56°
27
72°
57°
28
71°
56°
29
71°
56°
30
70°
57°
1
72°
55°
2
71°
56°
3
72°
56°
4
72°
57°
5
68°
56°
6
67°
56°
7
67°
55°
8
68°
55°
9
67°
54°
10
67°
55°
11
68°
53°
12
66°
52°
13
67°
53°
14
68°
53°
15
68°
54°
16
69°
55°
17
68°
56°
18
71°
57°
19
72°
56°
20
71°
57°
21
71°
54°
22
72°
55°
23
72°
57°
24
73°
56°
25
72°
57°
26
73°
57°
27
73°
58°
28
74°
60°
29
73°
60°
30
74°
59°
31
75°
58°
1
74°
57°
2
75°
59°
3
75°
61°
4
78°
59°
5
76°
58°
6
76°
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 66° to 78°, with overnight lows between 52° and 61°. The average high for May is 71° with an average low of 56°. 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.
