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ThailandThe weather in January in Koh Samui
It's hot in January in Koh Samui with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 31°C. At night, you can expect temperatures between 25°C and 26°C.
Looking for sun? January isn’t a good month to be in Koh Samui. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Koh Samui, Thailand. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2023, Koh Samui reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 25°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 20°C to a highest value of 28°C.
Rainfall amount
In January, there is an average of 154 mm of precipitation, spread over 16 days. The wind speed is around 4 Bft, mostly coming from the East.
Daily weather in January for Koh Samui
Click on any day in January to get detailed info about the usual weather on that day in Koh Samui. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Koh Samui | New York | |
|---|---|---|
| Average temperature | 31°C | 5°C |
| Max. temperature | 31°C | 11°C |
| Min. temperature | 25°C | -5°C |
| Total precipitation | 154 mm | 97 mm |
| Rainy days | 16 days | 12 days |
Start of January
The month of January starts in Koh Samui with hot temps, averaging around 31°C during the day and nights around 26°C.
Mid January
By mid-January, daytime temps stay steady at around 31°C, with nights around 26°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of January
By the end of January, the average daytime temperature in Koh Samui is around 31°C, while nighttime temps are about 26°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Koh Samui for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Koh Samui, Thailand. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Koh Samui
Temperature in January in Koh Samui over the years
Precipitation charts
These charts show the average amount of precipitation in January in Koh Samui, Thailand. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Koh Samui
Total precipitation in January in Koh Samui over the years
Daily UV index in January in Koh Samui
This chart shows the average daily UV index in January in Koh Samui, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Koh Samui
The weather in January in Koh Samui is rated an average of 5 out of 5 stars by 2 visitors. Have you been to Koh Samui? Share your weather experience to help other visitors.
Write your own review
Sunny, warm weather with rare brief showers. For people who like a tropical climate, it was a paradise on earth.— This text is automatically translated to English
Wonderful , beautiful weather every day and if it rained a bit I just liked it. a quiet beach where I stayed I went to Koh Samui Bophut every year for two months in recent years and well in that fine resort Palm Beach. My last trip was 10-1 - 2019 unfortunately corona came between. I miss it very much. by circumstance illness and age also plays a role, so I hope that, that was not the last trip was, to that cozy wonderful Thailand.— This text is automatically translated to English
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Average weather in Koh Samui by month
Click on a month below to see detailed weather info for Koh Samui. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.