S
M
T
W
T
F
S
28
43°
32°
29
48°
29°
30
39°
25°
31
30°
15°
1
28°
13°
2
25°
11°
3
32°
14°
4
41°
27°
5
35°
21°
6
39°
19°
7
38°
21°
8
30°
17°
9
41°
20°
10
45°
20°
11
26°
14°
12
34°
14°
13
35°
16°
14
35°
15°
15
50°
33°
16
49°
34°
17
41°
27°
18
37°
25°
19
35°
13°
20
26°
11°
21
23°
10°
22
24°
8°
23
32°
11°
24
29°
16°
25
28°
15°
26
31°
18°
27
32°
17°
28
31°
15°
29
31°
16°
30
29°
15°
31
35°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Seoul
Seoul's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Seoul. See also: February | March | April.
