S
M
T
W
T
F
S
26
65°
53°
27
69°
51°
28
73°
43°
29
81°
55°
30
75°
60°
1
69°
56°
2
59°
49°
3
69°
44°
4
79°
48°
5
80°
53°
6
86°
60°
7
77°
54°
8
73°
51°
9
77°
55°
10
86°
63°
11
81°
54°
12
72°
48°
13
81°
50°
14
79°
56°
15
78°
49°
16
86°
51°
17
91°
60°
18
92°
69°
19
92°
63°
20
91°
64°
21
92°
65°
22
81°
67°
23
86°
69°
24
86°
67°
25
87°
71°
26
90°
73°
27
89°
74°
28
89°
65°
29
84°
67°
30
79°
55°
31
77°
58°
1
78°
62°
2
81°
57°
3
83°
60°
4
81°
62°
5
82°
63°
6
83°
66°
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 77° to 89°, with overnight lows between 55° and 67°. The average high for May is 82° with an average low of 62°. 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.
