Ko Samui Climate: Weather by Month and Best Time to Visit
Best months for Ko Samui: February, March.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 27°C | 26°C | 73 mm | 10 | – | – | 7.8 |
| February | 27°C | 26°C | 36 mm | 5 | – | – | 8.4 |
| March | 28°C | 27°C | 89 mm | 9 | – | – | 7.9 |
| April | 29°C | 27°C | 96 mm | 12 | – | – | 7.4 |
| May | 29°C | 27°C | 115 mm | 21 | – | – | 6.0 |
| June | 29°C | 27°C | 89 mm | 19 | – | – | 6.4 |
| July | 29°C | 27°C | 84 mm | 19 | – | – | 6.6 |
| August | 29°C | 27°C | 92 mm | 18 | – | – | 6.6 |
| September | 28°C | 26°C | 141 mm | 23 | – | – | 6.1 |
| October | 28°C | 26°C | 288 mm | 26 | – | – | 6.1 |
| November | 28°C | 26°C | 288 mm | 21 | – | – | 6.1 |
| December | 27°C | 26°C | 144 mm | 13 | – | – | 7.0 |