Last updated: March 2, 2024
The weather in Las Piedras, Puerto Rico, during September is characterized by an average temperature of 27°C (82°F). Highs can soar to 31°C (87°F), while lows may dip to 25°C (77°F). Typically, the humidity level in Las Piedras throughout September hovers around 79%.
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Average temperature
Maximum temperature
Humidity
In September, Las Piedras averages 195 mm (7.7 inches) of rainfall, typically over the course of 28 rainy days. The month enjoys an average of 12 hours 12 minutes of daylight, with the sun shining for approximately 10 hours 36 minutes each day. Additionally, there is a 46% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Las Piedras 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 | 2 | 5 | 9 | 12 | 14 | 13 | 10 | 7 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | |||||