ClimateForecastMayJune >>

Climate in Koh Samui (Bangkok Province), Thailand

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly precipitation

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

Forecast for Koh Samui

Thu   May 30
36°C | 27°C
SW 14 km/h
15 mm
broken clouds and thunder

broken clouds and thunder

Fri   May 31
34°C | 27°C
SW 22 km/h
12 mm
broken clouds and thunder

broken clouds and thunder

Sat   Jun 01
34°C | 26°C
SW 14 km/h
4.6 mm
broken clouds and rain

broken clouds and rain

The best time of year to visit Koh Samui in Thailand

Other facts from our historical weather data:

  • Which months have the greatest rainfall in Koh Samui?
    Most rainfall (rainy season) is seen in September, October, November and December.
  • Which is the hottest month in Koh Samui?
    May has an average maximum temperature of 31°C and is the hottest month of the year.
  • Which is the coolest month in Koh Samui?
    The coolest month is January with an average maximum temperature of 29°C.
  • Which is the wettest month in Koh Samui?
    October tops the wettest month list with 296 mm of rainfall.
  • Which is the driest month in Koh Samui?
    February is the driest month with 44 mm of precipitation.
  • Which is the sunniest month in Koh Samui?
    March is the sunniest month with an average of 240 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.