S
M
T
W
T
F
S
26
66°
52°
27
71°
53°
28
71°
53°
29
70°
54°
30
66°
48°
1
66°
47°
2
69°
49°
3
72°
55°
4
72°
53°
5
73°
53°
6
74°
52°
7
75°
56°
8
71°
58°
9
72°
56°
10
75°
57°
11
72°
57°
12
68°
56°
13
72°
53°
14
71°
57°
15
68°
56°
16
71°
54°
17
74°
56°
18
76°
59°
19
71°
59°
20
70°
58°
21
71°
57°
22
72°
57°
23
74°
61°
24
74°
61°
25
78°
58°
26
75°
56°
27
75°
57°
28
78°
59°
29
80°
57°
30
77°
58°
31
79°
59°
1
76°
58°
2
76°
58°
3
77°
60°
4
77°
62°
5
79°
64°
6
78°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seoul
Seoul's May 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 47° and 65°. The average high for May is 73° 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 Seoul. See also: June | July | August.
