Daytime highs, nighttime lows and the warmest cities in Koh Samui, Thailand this September.
Koh Samui, Thailand, a region in Thailand, experiences maximum daytime temperatures in September ranging from 30°C (86°F) in Chaweng Beach to 32°C (90°F) in Suratthani. Nighttime temperatures generally drop to 25°C (77°F) in Suratthani and 27°C (81°F) in Chaweng Beach.
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.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Koh Samui.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Average daytime highs in Koh Samui, Thailand during September reach about 30°C (86°F) in Chaweng Beach.
Chaweng Beach sees nighttime lows close to 27°C (81°F) in September.
Suratthani tops the warmest city list in our database with average maximum daytime temperatures around 32°C (90°F) and a minimum nighttime temperature of around 25°C (77°F).
In our database, Chaweng Beach is the chilliest city in September in Koh Samui, Thailand. Daytime temperatures typically peak at 30°C (86°F), while the nighttime lows hover around 27°C (81°F).
Chaweng Beach usually sees around 145 hours of sunlight, indicating a moderately sunny period.
We have much more information about the climate in Koh Samui.
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