Last updated: March 2, 2024
The weather in Ko Samui, Thailand, during December is characterized by an average temperature of 27°C (80°F). Highs can soar to 28°C (83°F), while lows may dip to 25°C (77°F). Typically, the humidity level in Ko Samui throughout December hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Ko Samui averages 207 mm (8.1 inches) of rainfall, typically over the course of 17 rainy days. The month enjoys an average of 11 hours 33 minutes of daylight, with the sun shining for approximately 9 hours 44 minutes each day. Additionally, there is a 39% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In December, the UV Index in Ko Samui reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 4 | 7 | 9 | 11 | 10 | 7 | 5 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||