Ko Samui: September Weather


Ko Samui Weather in September

September sees the end of the dry season and the start of the wet season.

You can expect occasional blue skies interspersed with clouds and frequent heavy rainfall that can occur at any time of the day or night.


Ko Samui Weather Averages in September 

Average Temperature (°C)  Temperature icon  28°C (82°F)
Average High Temperature (°C)  Temperature icon  32°C (89°F)
Average Low Temperature (°C)  temperature icon  25°C (77°F)
Hours of Sunshine (Daily)  sun icon  6 hours per day
Hours of Daylight (Daily)  12  12 hours per day
Comfort Level  Very high heat & humidity icon  Very high heat & 80% humidity
UV Index  11  Extreme
Days with some Rainfall  umbrella icon  11 days
Average Monthly Rainfall (mm)  rain cloud  130mm
Sea Temperature (°C)  swimming icon  29°C (84°F)
Weather averages for Ko Samui, Thailand

Best time to visit Ko Samui

The best time to visit Ko Samui is during the dry season from late-December to April, with February to April usually the driest months averaging 28°C (82°F).

Ko Samui Annual Weather


Ko Samui Monthly Weather Review

January February March April May June
July August September October November December
Latest update on this honeymoon destination: 11 June, 2020
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