Last updated: March 2, 2024
The weather in Sintra, Portugal, during December is characterized by an average temperature of 14°C (58°F). Highs can soar to 17°C (63°F), while lows may dip to 11°C (51°F). Typically, the humidity level in Sintra throughout December hovers around 85%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Sintra averages 73 mm (2.9 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 9 hours 28 minutes of daylight, with the sun shining for approximately 7 hours 14 minutes each day. Additionally, there is a 39% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Sintra reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 30 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 | 1 | 2 | 2 | 3 | 3 | 2 | 1 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||