Annual average climate in Koh Samui
Below are the key elements of the climate averages over the whole year in Ko Samui:
- Minimum annual temperature: 25°C
- Average annual temperature: 28°C
- Maximum annual temperature: 31°C
- Precipitation: 239 mm/month (with 20 rainy days/month)
Monthly climate normals
| Min / Max | Precipitation | |
| January | 24 ° / 29 ° | 163mm / 18 days |
| february | 25 ° / 29 ° | - |
| March | 25 ° / 30 ° | 299mm / 15 days |
| April | 26 ° / 32 ° | 144mm / 17 days |
| may | 26 ° / 33 ° | 185mm / 21 days |
| June | 26 ° / 33 ° | 167mm / 17 days |
| July | 25 ° / 32 ° | 160mm / 21 days |
| August | 25 ° / 32 ° | 124mm / 20 days |
| September | 25 ° / 32 ° | 159mm / 20 days |
| October | 24 ° / 31 ° | 315mm / 24 days |
| November | 24 ° / 30 ° | 575mm / 24 days |
| December | 24 ° / 30 ° | 340mm / 22 days |
These weather statistics were generated from the values provided by the KO SAMUI weather station. This one is in Thailand, 15 km from Ko Samui and is located at an altitude of 7 meters.
The best time to go (and the worst)
Below are some additional statistics that should help you decide which is the best month to travel to Ko Samui, or which months to avoid.
Which are the hottest months in Koh Samui?
In Ko Samui, the months of the year with the highest maximum temperatures are:
may (with 33°C), June (with 33°C), April (with 32°C), …
What are the coldest months?
The months of the year with the lowest average temperatures in Ko Samui are:
November (with 27°C), february (with 27°C), December (with 27°C), …
Which are the driest months in Koh Samui?
In Ko Samui, the months of the year with the fewest rainy days are:
March (with 15 rainy days/month), June (with 17 rainy days/month), April (with 17 rainy days/month), …
What are the rainiest months?
The months with the most rainy days in Koh Samui are:
November (with 24 rainy days/month), October (with 24 rainy days/month), December (with 22 rainy days/month), …
What is the weather around?
Nearby cities with a similar climate
These other cities around Ko Samui may experience very similar weather patterns:
Ko Pha Ngan (à 27 km from Ko Samui), …
Around Koh Samui
You might also be interested in these cities:
Surat Thani (79 km from Ko Samui), Nakhon Si Thammarat (123 km), Chumpon (135 km), …
In Thailand
Check the weather forecasts for other major cities in Thailand:
Bangkok (473 km from Ko Samui), Samut Prakan (458 km), Mueang Nonthaburi (485 km), Udon Thani (929 km), Chon Buri (441 km), Nakhon Ratchasima (649 km), Chiang Mai (1034 km), Hat Yai (287 km), Lampang (975 km), Khon Kaen (830 km),
The traveler's toolbox 🧳
Prepare, compare, and book your trip with our selection of must-see sites:
🛏 Booking: find your hotel/accommodation around the world
🔁 HomeExchange: the #1 home exchange platform
✈️ Skyscanner: surely the best flight comparator
⏱ LastMinute: the best offers for leaving at the last minute
🚗 RentalCars: search and compare car rental
🎟 GetYourGuide: book unforgettable tours and experiences
