Last updated: March 2, 2024
The weather in Chiang Rai, Thailand, during September is characterized by an average temperature of 26°C (80°F). Highs can soar to 34°C (94°F), while lows may dip to 22°C (72°F). Typically, the humidity level in Chiang Rai throughout September hovers around 83%.
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Average temperature
Maximum temperature
Humidity
In September, Chiang Rai averages 260 mm (10.2 inches) of rainfall, typically over the course of 24 rainy days. The month enjoys an average of 12 hours 13 minutes of daylight, with the sun shining for approximately 9 hours 9 minutes each day. Additionally, there is a 27% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Chiang Rai 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 | 13 | 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 | |||||