Last updated: August 27, 2025
In Santo Andre, Portugal, the average temperature in December hovers around 11°C (53°F), with a minimum dipping down to -1°C (30°F) and a comfortable maximum reaching 20°C (69°F). Expect precipitation of about 57 mm (2.2 in) spread over 8 days, while the air maintains a high average humidity of 85%.
In December in Santo Andre, the average temperature is 11°C (53°F). The maximum can reach 20°C (69°F), and the minimum can be as low as -1°C (30°F). Be prepared for a range of weather conditions when traveling, as you may experience both mild days and chilly nights.
In Santo Andre in December, the precipitation amount is 57 mm (2.2 in) over the course of 8 days.
In Santo Andre in December humidity is 85%. With an average temperature of 11°C (53°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and creating a dampness in the air that can be exhausting for travelers.
In Santo Andre 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 Santo Andre, you can check the information here.
UV Risk Categories
Weather in Santo Andre varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santo Andre, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 9°C (49°F) | 35 mm (1.4 inches) | 85% | moderate |
| February Weather | 12°C (54°F) | 50 mm (2.0 inches) | 75% | moderate |
| March Weather | 13°C (56°F) | 80 mm (3.1 inches) | 72% | high |
| April Weather | 15°C (60°F) | 81 mm (3.2 inches) | 70% | very high |
| May Weather | 19°C (67°F) | 39 mm (1.5 inches) | 70% | very high |
| June Weather | 21°C (70°F) | 15 mm (0.6 inches) | 63% | extreme |
| July Weather | 23°C (74°F) | 5 mm (0.2 inches) | 60% | very high |
| August Weather | 24°C (75°F) | 6 mm (0.3 inches) | 60% | very high |
| September Weather | 22°C (72°F) | 28 mm (1.1 inches) | 67% | very high |
| October Weather | 19°C (66°F) | 43 mm (1.7 inches) | 74% | high |
| November Weather | 13°C (56°F) | 73 mm (2.9 inches) | 83% | moderate |
| December Weather | 11°C (53°F) | 57 mm (2.2 inches) | 85% | moderate |