Weather for Ko Samui in January is typically good with an average maximum temperature of +77°F during the day, and approximately 5 sunny days monthly. Typically, there are about 4 rainy days with the total average precipitation that falls in January around 48 mm. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Good to know:
January is usually the coldest month of the year in Ko Samui;
Average weather
☀️
+77°F
Avg. max. temperature
+68°F
Min.
+84°F
Max.
48 mm
Total precipitation
78%
Avg. humidity
3 m/s
Avg. wind
5 ☀️
Sunny Days
22 ⛅️
Cloudy
4 🌦
Rainy
Our opinion: Ko Samui has good weather in January.
Average temperature in Ko Samui in January
Here are the expected maximum, average and minimum temperatures in Ko Samui for January based on the historical data.
Last Year
Historical Data
The temperature in January is +79°F on average, with a range between a maximum of +81°F during the day and a minimum of +75°F at night.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +79°F to +79°F.
Is Ko Samui warm or cold in January?
Ko Samui is typically warm in January.
Maximum temperatures go down compared to the previous month from +77°F to +77°F. The minimum temperature also goes up from +75°F to +75°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
January is the coldest month in Ko Samui, here is the comparison with other months:
Climate in Ko Samui in January
Ko Samui weather looks like this, on average, in January and the surrounding months.
December
January
February
Avg. temperature
+77°F
+77°F
+79°F
Min. temperature
+68°F
+68°F
+63°F
Max. temperature
+86°F
+84°F
+90°F
Rainfall
116 mm
48 mm
30 mm
Wind
3 m/s
3 m/s
3 m/s
Humidity
78%
78%
77%
Air pressure
1010 HPa
1011 HPa
1010 HPa
Sunny days
3
5
7
Cloudy days
19
22
19
Rainy days
9
4
2
Snowy days
0
0
0
January often has better weather than December.The temperature levels stay the same in the area of +77°F for average maximum temperature during the day.As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 116 mm to 48 mm.Humidity levels don’t change as the month goes on, averaging around 78%.The average wind speed doesn’t change much during January, staying around 3 m/s.The good news is there are likely to be more sunny days in January, from 3 to 5.
February brings much the same weather, it remains good.
Wind speed in Ko Samui in January based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Ko Samui is gradually increasing during January, going from 5 m/s to 5 m/s over the course of the month.
Rain
Amount of rainfall in mm during January in Ko Samui based on historical data.
Last Year
Historical Data
Typically, there is a 13% chance of rain on an average day in January, with total rainfall of approximately 6 mm. The maximum amount of rainfall per day is around 1 mm, which is considered light rain.Ko Samui is amazing in January with as little as 4 rainy days on average, so plan adventures in the great outdoors.
Here’s how January is compared with other months in the amount of precipitation, total mm:
Ko Samui wettest month is November, where a typical day has a 57% chance of precipitation and 276 mm of rainfall per day. February, on the other hand, is the driest month with a mere 7% chance of precipitation and 30 mm of rainfall per day.
How was the weather last January in Ko Samui?
This is the weather in Ko Samui in January 2023:
1 January
☁️
+79°F
2 January
☀️
+79°F
3 January
☀️
+79°F
4 January
☀️
+79°F
5 January
☀️
+79°F
6 January
☀️
+79°F
7 January
☀️
+78°F
8 January
🌧️
+78°F
9 January
☀️
+78°F
10 January
☀️
+78°F
11 January
☀️
+78°F
12 January
☁️
+78°F
13 January
☀️
+77°F
14 January
☀️
+78°F
15 January
☀️
+78°F
16 January
☀️
+78°F
17 January
☀️
+78°F
18 January
☀️
+78°F
19 January
🌧️
+78°F
20 January
☀️
+78°F
21 January
☀️
+78°F
22 January
☀️
+78°F
23 January
☀️
+78°F
24 January
☀️
+78°F
25 January
☁️
+79°F
26 January
☀️
+79°F
27 January
☀️
+79°F
28 January
☀️
+79°F
29 January
☀️
+79°F
30 January
☀️
+80°F
31 January
☀️
+79°F
In January 2023 Ko Samui had 26 sunny days, 3 cloudy days, and 2 rainy days. The average maximum temperature was +79°F, with an absolute maximum of +81°F and a minimum of +77°F. The average humidity was 75%, with a maximum of 94% and a minimum of 58%. The average wind speed was 4 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in January?
Climate Change Over the Years
This is how Ko Samui climate has changed over the last 43 years.
The climate in Ko Samui in January has not changed that much over the last 43 years.
The average temperature was the lowest in 1981 (+80°F) and the highest in 2016 (+84°F). The driest year was 1980 with only 5 mm of rainfall, and the wettest year was 2017 with 344 mm.
FAQ
Frequently asked questions about the weather in Ko Samui in January:
Is January a good time to visit Ko Samui?
January is a really good time to go to Ko Samui. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Ko Samui.
Can you sunbathe in Ko Samui in January?
January is warm in Ko Samui. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Is Ko Samui rainy in January?
Ko Samui is usually dry in January. Plan your packing around outdoor activities and exploring.
Is it sunny in Ko Samui in January?
Usually, it’s not very sunny in Ko Samui in January, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Thailand
Check out the weather for other cities in Thailand.
For this page, we’ve looked at the typical weather in Ko Samui, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.