Koh Samui Sunshine Hours by Month

To truly understand a climate, we must look at its sunshine. This page shows the total number of hours of direct sunlight per month and the average hours per day in Koh Samui, Surat Thani Province, Thailand. This average is based on long-term data collected between 1990 and 2020.

Monthly hours of sunshine

Those who love seasonal contrasts will appreciate Koh Samui. Expect long, bright days with 240 hours in March and darker periods with just 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 enjoys an average of 2151 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

In contrast, London, UK, receives only about 1659 hours of sunshine per year, known for its frequently overcast and rainy skies.

Vancouver, Canada, receives approximately 1940 hours of sunshine annually.

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

October, Koh Samui’s wettest month, receives 126 mm (5 in) of rainfall and has a maximum daytime temperature of 29°C (84°F). During the driest month February you can expect a temperature of 29°C (84°F).

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.