Average monthly snow and rainfall in Ko Samui in millimeter

This is the mean monthly precipitation over the year, including rain, snow, hail etc.
Show average precipitation in Ko Samui in Inches »

Average precipitation (rain/snow) in Ko Samui, Thailand   Copyright © 2023  weather-and-climate.com

Feel free to add this climate graph to your website. Click the copy button above.


  • A lot of rain (rainy season) falls in the months: January, May, June, July, August, September, October, November and December.
  • On average, November is the wettest month with 464 mm (18.3 inches) of precipitation.
  • On average, February is the driest month with 30 mm (1.2 inches) of precipitation.
  • The average amount of annual precipitation is: 2062 mm (81.2 inches)


Weather Forecasts for Ko Samui

Sun   Mar 26
34°C | 25°C
E 11 km/h
almost clear and no rain

almost clear and no rain

Mon   Mar 27
33°C | 26°C
E 11 km/h
0.9 mm
broken clouds and showers

broken clouds and showers

Tue   Mar 28
33°C | 25°C
SE 18 km/h
half cloudy and no rain

half cloudy and no rain

Where to stay in Ko Samui

Interested in more climate information?

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

Our site offers climate and forecast data for almost all countries 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 suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.