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Koh Samet Climate by Month

Koh Samet maintains a fairly consistent very warm average temperature. It also has a relatively rainy climate with high levels of precipitation. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

With minimal seasonal shifts, Koh Samet experiences a constant climate year-round. On average, daytime temperatures range from a very warm 31°C in April to a very warm 30°C in December. Nighttime temperatures can drop, with averages reaching 25°C in December.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Koh Samet has a notably wet climate with abundant precipitation, recording 1960 mm of rainfall per year. The seasons in Koh Samet, bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 322 mm of precipitation. This rainfall is distributed across 19 rainy days.

In contrast, the driest month, December, experiences much less rainfall, totaling 16 mm over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

In Koh Samet, summer days are longer and more sunny, with daily sunshine hours peaking at 8.0 hours in March. As the darker season arrives, the brightness of the sun becomes less. September sees a soft sun for only 3.7 hours per average day.

Monthly hours of sunshine

Data from: Jomtien Beach, Thailand (66 KM, 41 Miles).

Daily hours of sunshine

Data from: Jomtien Beach, Thailand (66 KM, 41 Miles).

The best time of year to visit Koh Samet in Thailand

Koh Samet has high temperatures year round ranging between 30°C and 31°C.
The best time to visit is during the drier months: January, February, November and December.

Other facts from our historical weather data:
  • When is the rainy season in Koh Samet?
    Rainy season in Koh Samet occurs in the months of May, June, July, August, September and October.
  • Which is the hottest month in Koh Samet?
    May has an average maximum temperature of 31°C and is the hottest month of the year.
  • Which is the coolest month in Koh Samet?
    The coolest month is December with an average maximum temperature of 30°C.
  • Which is the wettest month in Koh Samet?
    September tops the wettest month list with 322 mm of rainfall.
  • Which is the driest month in Koh Samet?
    December is the driest month with 16 mm of precipitation.
  • Which is the sunniest month in Koh Samet?
    March is the sunniest month with an average of 240 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Koh Samet

    Thu   Dec 12
    31°C | 25°C
    NE 25 km/h
    20 mm
    broken clouds and  chance of slight rain

    broken clouds and chance of slight rain

    Fri   Dec 13
    30°C | 25°C
    NE 22 km/h
    12 mm
    broken clouds and rain

    broken clouds and rain

    Sat   Dec 14
    30°C | 24°C
    NE 25 km/h
    2.3 mm
    partly cloudy and  chance of slight rain

    partly cloudy and chance of slight rain