Last updated: August 27, 2025
In December, the average temperature in Castillejo-Sierra, Spain hovers around 5°C (42°F). Expect minimums dipping to -5°C (23°F) and maximums reaching up to 18°C (65°F). During this period, you'll encounter approximately 80 mm (3.1 in) of precipitation over 9 days, coupled with a relatively high average humidity of 84%. Prepare for a month that balances cool crispness with occasional wet weather!
In December in Castillejo-Sierra, the average temperature is 5°C (42°F). Maximum temperatures can reach 18°C (65°F), while minimums can drop as low as -5°C (23°F). Be prepared for a range of weather conditions if you're planning to travel during this time.
In Castillejo-Sierra in December, the precipitation amount is 80 mm (3.1 in) spread over 9 days.
In Castillejo-Sierra in December, humidity is 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.
In Castillejo-Sierra 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 Castillejo-Sierra, you can check the information here.
UV Risk Categories
Weather in Castillejo-Sierra varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castillejo-Sierra, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 44 mm (1.8 inches) | 85% | moderate |
| February Weather | 6°C (44°F) | 47 mm (1.9 inches) | 80% | moderate |
| March Weather | 8°C (47°F) | 89 mm (3.5 inches) | 73% | high |
| April Weather | 10°C (51°F) | 101 mm (4.0 inches) | 69% | very high |
| May Weather | 15°C (60°F) | 59 mm (2.3 inches) | 64% | very high |
| June Weather | 20°C (69°F) | 31 mm (1.2 inches) | 59% | extreme |
| July Weather | 24°C (76°F) | 15 mm (0.6 inches) | 58% | extreme |
| August Weather | 24°C (76°F) | 18 mm (0.7 inches) | 58% | very high |
| September Weather | 19°C (67°F) | 34 mm (1.4 inches) | 64% | very high |
| October Weather | 14°C (57°F) | 56 mm (2.2 inches) | 76% | high |
| November Weather | 8°C (46°F) | 95 mm (3.7 inches) | 82% | moderate |
| December Weather | 5°C (42°F) | 80 mm (3.1 inches) | 84% | moderate |