Climate in Ko Samui, Thailand

The graphs below show the monthly weather averages over the year.
* Data from weather station: Ko Samui, Thailand.

Average day and night temperature

The mean minimum and maximum temperatures over the year. Show in Fahrenheit

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc. Show in Inches

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year

Weather Forecasts for Ko Samui

MON Jun 14
31°C | 29°C

Moderate rain

TUE Jun 15
31°C | 29°C

Patchy rain possible

WED Jun 16
31°C | 22°C

Patchy rain possible

The best time of year to visit Ko Samui in Thailand

Here are some average weather facts we collected from our historical climate data:

  • On average, the temperatures are always high.
  • A lot of rain (rainy season) falls in the month of: May, October, November and December.
  • The warmest month is May with an average maximum temperature of 33°C (91°F).
  • The coldest month is January with an average maximum temperature of 29°C (84°F).
  • November is the most wet month. This month should be avoided if you are not a big fan of rain.
  • February is the driest month.
  • March is the most sunny month.
No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.