Last updated: March 2, 2024
The weather in Dehiwala-Mount Lavinia, Sri Lanka, during September is characterized by an average temperature of 27°C (81°F). Highs can soar to 30°C (86°F), while lows may dip to 25°C (77°F). Typically, the humidity level in Dehiwala-Mount Lavinia throughout September hovers around 82%.
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In September, Dehiwala-Mount Lavinia averages 238 mm (9.4 inches) of rainfall, typically over the course of 26 rainy days. The month enjoys an average of 12 hours 8 minutes of daylight, with the sun shining for approximately 10 hours 13 minutes each day. Additionally, there is a 19% probability of sunny days during this period.
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In September, the UV Index in Dehiwala-Mount Lavinia reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, 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 | 2 | 4 | 8 | 12 | 14 | 14 | 12 | 8 | 5 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 30 min | 45 min | ||||||