Koh Samui weather in December (Bangkok Province, Thailand)

Curious about the December weather in Koh Samui? Check out this comprehensive weather guide.

In December, Koh Samui generally has high temperatures and high rainfall. Anticipate daytime temperatures around 29°C, while night temperatures can drop to 26°C.

Koh Samui in December usually receives high rainfall, averaging around 150 mm for the month. When we look at the climate data from the last 30 years, we can expect around 14 days of rain.

The area experiences a moderate amount of sunshine, with approximately 177 hours of sunlight expected. This makes it neither too gloomy nor overly bright.

If you prefer dry days with pleasant temperatures, January and February typically offer the best circumstances. While October and November tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Koh Samui climate page with graphs.

 

Koh Samui, monthly averages in December

Min TemperatureMin Temperature 26°C  
Max TemperatureMax Temperature 29°C  
Water TemperatureWater Temperature 29°C  
Chance of RainChance of Rain 45%  
PrecipitationPrecipitation 150 mm  
Rainy daysRainy days 14 days  
HumidityHumidity 82%  
SunshineSunshine 177 hours  
Percentage SunshinePercentage Sunshine  

Where to go in Thailand in December

Find out more about the weather in Thailand in December and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Koh Samui in December?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case. With a water temperature of around 29°C this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Swimming
7/10
Cycling
7/10
Walking
7/10
Camping
7/10
Outdoor sports
7/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Koh Samui.

Our site offers climate and forecast data for every country in the world. Are you going to Thailand? On this website you can find historical weather averages for many cities in Thailand. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.