Last updated: March 2, 2024
The weather in Ribeira Seca, Portugal, during September is characterized by an average temperature of 22°C (71°F). Highs can soar to 25°C (78°F), while lows may dip to 19°C (66°F). Typically, the humidity level in Ribeira Seca throughout September hovers around 81%.
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Average temperature
Maximum temperature
Humidity
In September, Ribeira Seca averages 67 mm (2.6 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 22 minutes of daylight, with the sun shining for approximately 10 hours 50 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 Ribeira Seca reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 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 | 0 | 1 | 2 | 3 | 5 | 7 | 9 | 9 | 8 | 6 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||