Last updated: March 2, 2024
The weather in Ko Samui, Thailand, during May is characterized by an average temperature of 28°C (84°F). Highs can soar to 31°C (88°F), while lows may dip to 26°C (80°F). Typically, the humidity level in Ko Samui throughout May hovers around 77%.
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Average temperature
Maximum temperature
Humidity
In May, Ko Samui averages 126 mm (5.0 inches) of rainfall, typically over the course of 22 rainy days. The month enjoys an average of 12 hours 32 minutes of daylight, with the sun shining for approximately 10 hours 40 minutes each day. Additionally, there is a 21% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In May, the UV Index in Ko Samui reaches a maximum of 14, 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 | 3 | 6 | 10 | 13 | 14 | 14 | 11 | 7 | 4 | 1 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | High | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 25 min | 30 min | 45 min | |||||