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ThailandThe weather in May in Koh Samui
It's hot in May in Koh Samui with an average temperature of 34°C. Temperatures this month range from a low of 33°C to a high of 35°C. At night, you can expect temperatures between 27°C and 28°C.
Looking for sun? May isn’t a good month to be in Koh Samui. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Koh Samui, Thailand. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 37°C in 2023, Koh Samui reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 28°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 23°C to a highest value of 30°C.
Rainfall amount
In May, there is an average of 162 mm of precipitation, spread over 19 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in May for Koh Samui
Click on any day in May to get detailed info about the usual weather on that day in Koh Samui. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Koh Samui | New York | |
|---|---|---|
| Average temperature | 34°C | 22°C |
| Max. temperature | 35°C | 28°C |
| Min. temperature | 27°C | -5°C |
| Total precipitation | 162 mm | 105 mm |
| Rainy days | 19 days | 14 days |
Start of May
The month of May starts in Koh Samui with hot temps, averaging around 34°C during the day and nights around 28°C.
Mid May
By mid-May, daytime temps rise to around 35°C, with nights around 28°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in Koh Samui is around 34°C, while nighttime temps are about 28°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Find affordable vacations to Koh Samui
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The typhoon season in Koh Samui runs from June to November.
Check out the climate of Koh Samui for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Koh Samui, Thailand. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Koh Samui
Temperature in May in Koh Samui over the years
Precipitation charts
These charts show the average amount of precipitation in May in Koh Samui, Thailand. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Koh Samui
Total precipitation in May in Koh Samui over the years
Daily UV index in May in Koh Samui
This chart shows the average daily UV index in May in Koh Samui, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in Koh Samui
The weather in May in Koh Samui is rated 4 out of 5 stars by 1 visitor. Have you been to Koh Samui? Share your weather experience to help other visitors.
Write your own review
The warm temperatures were perfect for beach days. Even though it is a little humid at times, I am very satisfied.— This text is automatically translated to English
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Average weather in Koh Samui by month
Click on a month below to see detailed weather info for Koh Samui. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.