Koh Samui weather in September (Bangkok Province, Thailand)
What can you expect from the weather in Koh Samui during September? Check out this comprehensive weather guide.
In September, Koh Samui generally has high temperatures and high rainfall. Throughout the day, temperatures typically settle at around 30°C. But by evening, they drop to around 27°C. Remember, these are typical temperatures, and certain days could be even hotter. Ensure you wear appropriate clothing to handle the warmth.
Koh Samui in September usually receives high rainfall, averaging around 156 mm for the month. Typically around 18 days of rainfall is expected.
The city usually sees around 145 hours of sunlight, indicating a moderately sunny period.
Should you favor a climate that's both dry and comfortably warm January and February typically offer the most agreeable circumstances. On the other hand, October and November tend to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized Koh Samui climate page with graphs.
Koh Samui, monthly averages in September
Min Temperature
27°C
Max Temperature
30°C
Water Temperature
29°C
Chance of Rain
58%
Precipitation
156 mm
Rainy days
18 days
Humidity
79%
Sunshine
145 hours
Percentage Sunshine
Where to go in Thailand in September
Find out more about the weather in Thailand in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Koh Samui in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case. With a water temperature of around 29°C this is a great month to swim so bring your swimwear.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Koh Samui.
Our site offers climate and forecast data for every country in the world. Are you going to Thailand? On this website you can find historical weather averages for many cities in Thailand. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
