Koh 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. The climate is warm and humid 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, given the tropical climate, rain showers are brief; 20–60 minutes duration is typical. The island sees on average just under 2000 mm of precipitation annually.