ThailandAverage weather for Koh Samui in December
It's hot in December in Koh Samui with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 32°C. At night, you can expect temperatures between 25°C and 26°C.
Start of December
The month of December 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 December
By mid-December, daytime temps rise to around 32°C, with nights around 26°C. There’s a high chance of precipitation during this time. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of December
By the end of December, the average daytime temperature in Koh Samui is around 31°C, while nighttime temps are about 26°C. There’s a significant chance of many days with precipitation. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In December, there is an average of 361 mm of precipitation, spread over 17 days. The wind speed is around 4 Bft, mostly coming from the East.
Koh Samui in December |
New York | ||
|---|---|---|---|
 Average temperature |
31°C | 9°C | |
 Max. temperature |
32°C | 12°C | |
| Min. temperature |
30°C | -5°C | |
 Total precipitation |
361 mm | 133 mm | |
| Rainy days |
17 days | 17 days | |
November
UV index
The UV index is a maximum of 8 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 December a good time to visit Koh Samui?
Looking for sun? December isn’t a good month to be in Koh Samui. The temperature is nice, but there’s too much chance of rain.
The typhoon season in Koh Samui runs from June to November.
Temperature records
With 34°C in 2023, Koh Samui reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 26°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 21°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 December in Koh Samui
This chart shows the average daily high and low temperatures in December 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 December in Koh Samui
Good
Expect lots of sunshine, but be prepared for the occasional ... more
Daily Precipitation in December in Koh Samui
The chart below shows the average daily precipitation in December 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 December, you can expect about 17 days of precipitation in Koh Samui.
Daily UV index in December in Koh Samui
This chart shows the average daily UV index in December 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 December in Koh Samui over the years
This chart shows the average temperature in December in Koh Samui, measured in degrees Celsius, over the past few years.
Total precipitation in December in Koh Samui over the years
This chart shows the average precipitation in December 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 December for Koh Samui
Click on any day in December 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 December in Koh Samui
The weather in December in Koh Samui is rated 4 out of 5 stars by 1 visitor. Have you been to Koh Samui? Share your weather experience to help other visitors.
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Expect lots of sunshine, but be prepared for the occasional rain shower!— 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
