Ko Samui weather in September 2022

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  • 31°C maximum daytime temperature in September in Ko Samui31
    31°C max day temperature
  • 6 hours of sunshine per day
  • 17 days with some rainfall in September in Ko Samui17
    17 days with some rainfall
  • 24°C minimum night-time temperature in September in Ko Samui24
    24°C min night temperature
  • 12 hours of daylight per day in September in Ko Samui12
    12 hours of daylight per day
  • Very high heat & humidity in September in Ko SamuiVH
    Very High heat & humidity
  • 141 mm monthly rainfall in September in Ko Samui141
    141 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Ko Samui11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Ko Samui29
    29°C sea temperature
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The September weather guide for Ko Samui, Thailand shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

How hot is it in Ko Samui in September?

Daytime temperatures usually reach 31°C in Ko Samui in September with very high heat and humidity, falling to 24°C at night.

How sunny is it in Ko Samui in September?

There are normally 6 hours of bright sunshine each day in Ko Samui in September - that's 47% of daylight hours.

How warm is the sea around Ko Samui in September?

The average sea temperature around Ko Samui in September is 29°C.

Does it rain in Ko Samui in September?

There are usually 17 days with some rain in Ko Samui in September and the average monthly rainfall is 141mm.

Metric (°C / mm)  |  Imperial (°F / inches)

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Ko Samui sunrise & sunset times for September 2022

Browse the sunrise and sunset times for Ko Samui in September 2022. Select a month to view Ko Samui sunrise & sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st September 2022 06:11 18:29
Thursday, 15th September 2022 06:10 18:20
Friday, 30th September 2022 06:08 18:11
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