S
M
T
W
T
F
S
28
54°
37°
29
61°
46°
30
52°
41°
31
45°
36°
1
39°
34°
2
39°
34°
3
45°
39°
4
48°
41°
5
48°
39°
6
46°
36°
7
48°
43°
8
43°
37°
9
50°
39°
10
55°
37°
11
39°
34°
12
54°
36°
13
54°
37°
14
54°
34°
15
64°
45°
16
59°
41°
17
50°
41°
18
59°
41°
19
54°
36°
20
37°
34°
21
36°
32°
22
37°
32°
23
45°
36°
24
45°
37°
25
41°
30°
26
41°
32°
27
43°
37°
28
41°
36°
29
45°
32°
30
39°
34°
31
43°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Jeju
Jeju'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 Jeju. See also: February | March | April.
