Last updated: March 2, 2024
The weather in Si Ma Cai, Vietnam, during September is characterized by an average temperature of 23°C (74°F). Highs can soar to 30°C (87°F), while lows may dip to 18°C (64°F). Typically, the humidity level in Si Ma Cai throughout September hovers around 81%.
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Average temperature
Maximum temperature
Humidity
In September, Si Ma Cai averages 229 mm (9.0 inches) of rainfall, typically over the course of 24 rainy days. The month enjoys an average of 12 hours 15 minutes of daylight, with the sun shining for approximately 9 hours 6 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Si Ma Cai reaches a maximum of 13, 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 | 12 | 13 | 12 | 9 | 5 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 30 min | 45 min | |||||