Last updated: August 27, 2025
In December, the average temperature in Alcacer do Sal, Portugal is a pleasant 12°C (54°F). Temperatures can range from a chilly minimum of 0°C (32°F) to a warm maximum of 21°C (70°F). With an average precipitation of 49 mm (1.9 in) over 8 days, it's a good idea to keep an umbrella handy. Don't forget, the air carries a notable 85% humidity, adding to the unique climate of this enchanting location!
In December in Alcacer do Sal, the average temperature is 12°C (54°F). The maximum can reach 21°C (70°F), while the minimum can drop as low as 0°C (32°F). This weather makes Alcacer do Sal an ideal destination for travelers looking to enjoy mild temperatures and a comfortable atmosphere.
In Alcacer do Sal in December, the precipitation amount is 49 mm (1.9 in) spread over 8 days.
In Alcacer do Sal in December, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.
In Alcacer do Sal in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Alcacer do Sal, you can check the information here.
UV Risk Categories
Weather in Alcacer do Sal varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Alcacer do Sal, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (51°F) | 30 mm (1.2 inches) | 85% | moderate |
| February Weather | 12°C (55°F) | 52 mm (2.0 inches) | 75% | moderate |
| March Weather | 14°C (57°F) | 81 mm (3.2 inches) | 72% | high |
| April Weather | 15°C (60°F) | 73 mm (2.9 inches) | 70% | very high |
| May Weather | 19°C (66°F) | 30 mm (1.2 inches) | 70% | very high |
| June Weather | 20°C (69°F) | 9 mm (0.4 inches) | 63% | extreme |
| July Weather | 22°C (72°F) | 3 mm (0.1 inches) | 60% | very high |
| August Weather | 23°C (74°F) | 2 mm (0.1 inches) | 60% | very high |
| September Weather | 22°C (71°F) | 18 mm (0.7 inches) | 67% | very high |
| October Weather | 19°C (66°F) | 42 mm (1.6 inches) | 74% | high |
| November Weather | 14°C (58°F) | 56 mm (2.2 inches) | 83% | moderate |
| December Weather | 12°C (54°F) | 49 mm (1.9 inches) | 85% | moderate |