The following Koh Samui weather chart displays the average day time maximum temperatures (orange line), night time minimum (blue line) and the monthly average rain fall in mm forr Koh Samui (blue bar chart). 
The weather chart data for Koh Samui has been averaged over the month and is based on data collected over the previous 15 years. The weather chart of Koh Samui is based on averages and is provided to aid tourists and visitors to choose the most suitable time of the year to visit Koh Samui. As the Koh Samui weather chart is based on averages there can always be the chance of extremes or freak weather.
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