Last updated: August 27, 2025
In December, the average temperature in Castellar del Valles, Spain hovers around 8°C (48°F), with a minimum of -3°C (27°F) and a pleasant maximum reaching 19°C (66°F). Expect 26 mm (1.0 in) of precipitation over about 3 days during this month, alongside an average humidity of 79%. Plan accordingly for a mix of chilly and mild days!
In December in Castellar del Valles, the average temperature is 8°C (48°F). The maximum can reach 19°C (66°F) and the minimum can be as low as -3°C (27°F). Be prepared for a range of temperatures when traveling to Castellar del Valles during this month, and pack accordingly!
In Castellar del Valles in December, the precipitation amount is 26 mm (1.0 in) recorded over the course of 3 days.
In Castellar del Valles in December, humidity is 79%. With an average temperature of 8°C (48°F), this humidity feels like a chill that seeps into your bones, making outdoor activities less enjoyable and travel more challenging as you navigate the damp air.
In Castellar del Valles in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Castellar del Valles, you can visit Hourly UV Index in Castellar del Valles.
UV Risk Categories
Weather in Castellar del Valles varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castellar del Valles, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (45°F) | 52 mm (2.1 inches) | 79% | moderate |
| February Weather | 9°C (49°F) | 45 mm (1.8 inches) | 74% | moderate |
| March Weather | 11°C (52°F) | 51 mm (2.0 inches) | 71% | moderate |
| April Weather | 13°C (56°F) | 80 mm (3.2 inches) | 69% | high |
| May Weather | 17°C (63°F) | 57 mm (2.3 inches) | 66% | very high |
| June Weather | 21°C (71°F) | 39 mm (1.5 inches) | 65% | very high |
| July Weather | 24°C (76°F) | 41 mm (1.6 inches) | 64% | very high |
| August Weather | 24°C (76°F) | 52 mm (2.0 inches) | 64% | very high |
| September Weather | 21°C (70°F) | 93 mm (3.7 inches) | 68% | high |
| October Weather | 17°C (62°F) | 119 mm (4.7 inches) | 77% | high |
| November Weather | 11°C (53°F) | 64 mm (2.5 inches) | 79% | moderate |
| December Weather | 8°C (48°F) | 26 mm (1.0 inches) | 79% | low |