S
M
T
W
T
F
S
26
68°
55°
27
69°
56°
28
66°
53°
29
71°
52°
30
70°
54°
1
71°
56°
2
69°
54°
3
66°
56°
4
68°
56°
5
69°
57°
6
67°
55°
7
67°
56°
8
68°
55°
9
67°
54°
10
67°
54°
11
66°
57°
12
67°
56°
13
67°
58°
14
68°
57°
15
68°
58°
16
69°
57°
17
68°
57°
18
68°
58°
19
69°
58°
20
69°
56°
21
70°
55°
22
69°
55°
23
69°
57°
24
71°
58°
25
71°
58°
26
72°
59°
27
71°
57°
28
72°
58°
29
77°
60°
30
77°
60°
31
78°
58°
1
75°
58°
2
75°
57°
3
74°
56°
4
74°
57°
5
75°
61°
6
78°
63°
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 63°. The average high for May is 70° with an average low of 57°. 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.
