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Koh Samui Thailand
Temperatures in September
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Koh Samui temperatures in September

Koh Samui is a region in Thailand. September in has maximum daytime temperatures ranging from high in Chaweng Beach with 30°C to very high temperatures in Suratthani with 32°C. Nighttime temperatures generally drop to 25°C in Suratthani and 27°C in Chaweng Beach.

What is the temperature of the different cities in Koh Samui in September?

To get a sense of September's typical temperatures in the key spots of Koh Samui, explore the map below. Click on a point for an in-depth look.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in September in Koh Samui?
    • From a thorough analysis of our records, Suratthani clearly dominates in terms of high temperatures. The city witnesses daytime temperatures hovering around 32°C, and evenings that remain near 25°C.

  • What is the coldest city in September in Koh Samui?
    • According to our data, Chaweng Beach holds the title for the coldest city in Koh Samui in September. It experiences maximum temperatures of approximately 30°C and drops to lows of about 27°C during the night.

  • How much sun does Koh Samui get in September?
    • Most cities enjoy a balanced amount of sunshine, with around 145 hours of sunlight anticipated in Chaweng Beach. This ensures the days are neither too dim nor excessively sunny.

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