ThailandAverage weather for Koh Samui in January
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.
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. There are plenty of days with a good chance of precipitation. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In January, there is an average of 154 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the East.
Koh Samui in January |
New York | ||
|---|---|---|---|
 Average temperature |
31°C | 5°C | |
 Max. temperature |
31°C | 11°C | |
| Min. temperature |
30°C | -5°C | |
 Total precipitation |
154 mm | 97 mm | |
| Rainy days |
11 days | 12 days | |
December
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.
Is January a good time to visit Koh Samui?
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.
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.
Check out the climate of Koh Samui for all months and discover the best travel time
Daily Temperature in January in Koh Samui
This chart shows the average daily high and low temperatures in January for Koh Samui, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in January in Koh Samui
Excellent
Sunny, warm weather with rare brief showers. For people who ... more
Excellent
Wonderful , beautiful weather every day and if it rained a b... more
Daily Precipitation in January in Koh Samui
The chart below shows the average daily precipitation in January for Koh Samui, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect about 11 days of precipitation in Koh Samui.
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.
Temperature in January in Koh Samui over the years
This chart shows the average temperature in January in Koh Samui, measured in degrees Celsius, over the past few years.
Total precipitation in January in Koh Samui over the years
This chart shows the average precipitation in January in Koh Samui, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
Or check out the climate of Koh Samui for all months at once
