S
M
T
W
T
F
S
28
90°
74°
29
91°
75°
30
92°
74°
31
92°
74°
1
92°
74°
2
92°
71°
3
90°
72°
4
92°
72°
5
94°
72°
6
94°
71°
7
81°
74°
8
90°
72°
9
90°
72°
10
92°
72°
11
90°
71°
12
92°
70°
13
94°
70°
14
90°
70°
15
96°
73°
16
93°
74°
17
93°
73°
18
95°
73°
19
94°
74°
20
94°
74°
21
95°
73°
22
94°
71°
23
92°
70°
24
86°
71°
25
94°
71°
26
93°
73°
27
96°
71°
28
94°
71°
29
93°
73°
30
96°
75°
31
96°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Ko Samui
Ko Samui'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 Ko Samui. See also: February | March | April.
