Last updated: August 27, 2025
In December, the average temperature in Castanheira do Ribatejo, Portugal hovers around 12°C (54°F). Expect a chill with lows dipping to 1°C (34°F), while daytime highs can reach up to 20°C (68°F). Be prepared for some drizzle, as the region sees about 60 mm (2.4 in) of precipitation over approximately 8 days. With an average humidity of 85%, it’s a perfect time to cozy up indoors or enjoy a brisk stroll!
In December in Castanheira do Ribatejo, the average temperature is 12°C (54°F). Maximums can reach 20°C (68°F), while minimums can drop as low as 1°C (34°F). Travelers should be prepared for a mix of mild days and cooler nights during this time.
In Castanheira do Ribatejo in December, the total precipitation amount is 60 mm (2.4 in) spread over the course of 8 days.
In Castanheira do Ribatejo 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 Castanheira do Ribatejo 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 Castanheira do Ribatejo, you can check the information here.
UV Risk Categories
Weather in Castanheira do Ribatejo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castanheira do Ribatejo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (50°F) | 37 mm (1.4 inches) | 85% | moderate |
| February Weather | 12°C (54°F) | 52 mm (2.1 inches) | 75% | moderate |
| March Weather | 13°C (56°F) | 73 mm (2.9 inches) | 72% | high |
| April Weather | 15°C (59°F) | 83 mm (3.3 inches) | 70% | very high |
| May Weather | 18°C (65°F) | 42 mm (1.6 inches) | 70% | very high |
| June Weather | 19°C (67°F) | 12 mm (0.5 inches) | 63% | extreme |
| July Weather | 21°C (71°F) | 5 mm (0.2 inches) | 60% | very high |
| August Weather | 22°C (72°F) | 4 mm (0.2 inches) | 60% | very high |
| September Weather | 21°C (70°F) | 29 mm (1.1 inches) | 67% | very high |
| October Weather | 18°C (65°F) | 47 mm (1.9 inches) | 74% | high |
| November Weather | 14°C (57°F) | 84 mm (3.3 inches) | 83% | moderate |
| December Weather | 12°C (54°F) | 60 mm (2.4 inches) | 85% | moderate |