Last updated: August 27, 2025
In Santo da Serra, Portugal, the average temperature in December is a pleasant 17°C (63°F). Expect a minimum of 12°C (53°F) and a maximum of 20°C (69°F), making it a comfortable time to explore. However, be prepared for some rainfall, with an average precipitation amount of 62 mm (2.4 in) spread across 13 days. With an average humidity level of 75%, the atmosphere can feel quite moist, so pack accordingly!
In December in Santo da Serra, the average temperature is 17°C (63°F), with maximums reaching 20°C (69°F) and minimums dropping as low as 12°C (53°F). This mild climate makes Santo da Serra an ideal destination for travelers looking to enjoy comfortable weather.
In Santo da Serra in December, the precipitation amount is 62 mm (2.4 in) over the course of 13 days.
In Santo da Serra in December, humidity is 75%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities a bit sticky and requiring frequent breaks to stay refreshed during your travels.
In Santo da Serra in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Santo da Serra for better planning.
UV Risk Categories
Weather in Santo da Serra varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santo da Serra, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (61°F) | 42 mm (1.7 inches) | 75% | moderate |
| February Weather | 15°C (60°F) | 54 mm (2.1 inches) | 75% | high |
| March Weather | 15°C (60°F) | 49 mm (1.9 inches) | 78% | very high |
| April Weather | 16°C (61°F) | 47 mm (1.8 inches) | 78% | very high |
| May Weather | 17°C (63°F) | 18 mm (0.7 inches) | 77% | extreme |
| June Weather | 19°C (66°F) | 33 mm (1.3 inches) | 80% | extreme |
| July Weather | 20°C (69°F) | 12 mm (0.5 inches) | 83% | extreme |
| August Weather | 21°C (71°F) | 13 mm (0.5 inches) | 83% | extreme |
| September Weather | 21°C (71°F) | 22 mm (0.9 inches) | 81% | very high |
| October Weather | 20°C (69°F) | 54 mm (2.1 inches) | 80% | very high |
| November Weather | 18°C (65°F) | 61 mm (2.4 inches) | 75% | high |
| December Weather | 17°C (63°F) | 62 mm (2.4 inches) | 75% | moderate |