S
M
T
W
T
F
S
26
77°
52°
27
73°
55°
28
62°
49°
29
71°
47°
30
76°
52°
1
76°
56°
2
72°
55°
3
60°
49°
4
68°
47°
5
70°
47°
6
75°
48°
7
69°
53°
8
69°
50°
9
73°
49°
10
76°
50°
11
70°
55°
12
76°
58°
13
79°
56°
14
89°
59°
15
88°
65°
16
86°
64°
17
85°
61°
18
86°
60°
19
78°
68°
20
71°
58°
21
68°
58°
22
81°
59°
23
76°
60°
24
85°
59°
25
86°
64°
26
84°
71°
27
77°
67°
28
N/A
29
84°
57°
30
83°
58°
31
86°
60°
1
84°
58°
2
89°
59°
3
88°
64°
4
88°
66°
5
87°
67°
6
89°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Seoul
Seoul's May 2026 forecast shows daily high temperatures ranging from 83° to 89°, with overnight lows between 57° and 67°. The average high for May is 86° 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 Seoul. See also: June | July | August.
