Average Monthly Sunshine in Koh Samui

The graphs on this page shows the average number of hours per month and per day that Koh Samui receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in Koh Samui varies. It peaks at 240 hours in March and drops to 145 hours in September. The total annual amount of sun is 2151 hours.

Daily hours of sunshine

For those who appreciate different seasons, Koh Samui serves as an ideal destination. Expect longer, more sun-filled days in March with an average of 8.0 hours of sunshine daily, and embrace the darker days in September, offering only 4.8 hours of daily sunlight.

Koh Samui’s total hours of sunshine compared to other major cities

Koh Samui enjoys an average of 2151 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

In Seoul, South Korea, there are approximately 2133 hours of sunshine per year, mostly during spring and autumn.

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

Other climate information

October, Koh Samui’s wettest month, receives 126 mm of rainfall and has a maximum daytime temperature of 29°C. During the driest month February you can expect a temperature of 29°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Koh Samui Precipitation page.