S
M
T
W
T
F
S
26
70°
52°
27
70°
56°
28
72°
55°
29
72°
57°
30
71°
55°
1
72°
56°
2
72°
57°
3
71°
56°
4
69°
54°
5
67°
52°
6
69°
53°
7
67°
52°
8
67°
54°
9
68°
56°
10
68°
54°
11
69°
53°
12
67°
53°
13
68°
54°
14
68°
54°
15
69°
55°
16
68°
54°
17
71°
53°
18
72°
54°
19
69°
54°
20
69°
55°
21
71°
55°
22
72°
56°
23
72°
55°
24
73°
58°
25
74°
60°
26
77°
58°
27
74°
57°
28
73°
55°
29
73°
54°
30
74°
56°
31
74°
55°
1
75°
56°
2
74°
60°
3
76°
62°
4
79°
61°
5
82°
57°
6
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Porto
Porto's May 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 52° and 62°. The average high for May is 72° 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 Porto. See also: June | July | August.
