Ko Samui features a tropical monsoon climate under Köppen’s climate classification. However the city only has one true dry season month. Average monthly precipitation in February falls below 60 mm, the threshold for a tropical dry season month. Ko Samui, being in Surat Thani Province, is warm and moist for most of the year. However, in comparison to Phuket and most of the rest of Southern Thailand, Samui's weather is relatively dry. The heaviest precipitation is typically seen in the months of October and November . For the rest of the year, since the weather is tropical, when it does rain, it usually doesn’t last long; rain showers of 20–60 minutes are typical. The city sees on average just under 2000 mm of precipitation annually
