What’s the climate like in Ko Samui?
The current climate in Ko Samui features temperatures ranging from a high of 34°C to a low of 31°C throughout the year. The average yearly temperature is around 33°C. At night, temperatures in the colder months average around 25°C and in the warmer months around 27°C.
The highest temperature recorded in Ko Samui in recent years was 39°C in March 2015. The lowest daytime temperature recorded was 26°C in December 2015.
On average, Ko Samui receives 2257 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.
The typhoon season in Ko Samui runs from June to November.
Curious about the weather in other parts of Thailand? Check out the climate and weather for spots like Bangkok, Chiang Mai, Phuket, or explore other destinations in Thailand.
Best time to visit Ko Samui?
The best time to visit Ko Samui for mild to warm weather is February up to April and August. You might get some rain, but the temperatures are just right to explore Ko Samui.
Climate Table of Ko Samui
The climate table of Ko Samui shows the average temperatures, rainfall, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Temp. max (°C) | 31 | 31 | 32 | 33 | 34 | 34 | 33 | 33 | 33 | 32 | 31 | 31 |
Temp. min (°C) | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 26 |
Precipitation | ||||||||||||
Precipitation (mm) | 155 | 76 | 52 | 121 | 171 | 142 | 156 | 123 | 149 | 253 | 498 | 361 |
UV Index | 8 | 9 | 9 | 9 | 8 | 7 | 7 | 8 | 7 | 7 | 7 | 7 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 33°C
- Highest temperature: 34°C in May and June
- Lowest temperature: 31°C in January, February, November and December
- Precipitation: 2257 mm per year, averaging 188 mm per month
- Driest months: 52 mm in March, 76 mm in February and 121 mm in April
- Wettest months: 498 mm in November, 361 mm in December and 253 mm in October
Table of Contents
Average Temperature per Month in Ko Samui
This graph shows the average maximum temperatures per month in Ko Samui, Thailand. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Ko Samui
This graph shows how much rainfall Ko Samui, Thailand, gets on average per month. Rainfall is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of rainfall is measured in millimeters, and the average is calculated based on the recorded rainfall per month from past years.
Average UV Index per Month in Ko Samui
This graph shows the average UV index per month in Ko Samui, Thailand. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Ko Samui
This graph shows the average yearly temperature in Ko Samui, Thailand. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Ko Samui
This chart shows the total yearly precipitation in Ko Samui, Thailand, over the past few years. The total yearly precipitation, measured in millimeters, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences in Ko Samui
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Average weather in Ko Samui by month
Click on a month below to see detailed weather info for Ko Samui. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
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