What’s the climate like in Ko Samui?
The current climate of Ko Samui features average monthly temperatures ranging from highs of 34°C during the day to lows of 31°C. 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, London gets 701 mm of precipitation annually.
The typhoon season in Ko Samui runs from June to November.
Curious about the climate in other parts of Thailand? Check out the weather and climate in places like Bangkok, Chiang Mai, Phuket, or have a look at other destinations in Thailand.
Best time to visit Ko Samui?
The best time to visit Ko Samui for pleasant to warm weather is February through April and August. There might be some rain during this period, but the temperatures are just right for exploring Ko Samui.
Climate Table of Ko Samui
The climate table of Ko Samui shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation 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 precipitation Ko Samui, Thailand, gets on average per month. Precipitation 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 precipitation is measured in millimetres and the average is calculated based on the recorded precipitation 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 millimetres, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences in Ko Samui
The weather in Ko Samui is rated 0 out of 5 stars by 1 visitor.
Have you been to Ko Samui?
Share your weather experiences in Ko Samui.
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.
Popular destinations in Thailand
Discover the climate of these popular destinations in Thailand.
