Last updated: August 27, 2025
In December, the average temperature in Castrillo de Don Juan, Spain hovers around 6°C (42°F). Expect chilly nights with minimum temperatures dipping to -3°C (26°F), while daytime highs can reach up to 17°C (63°F). Be prepared for some rain, as the area receives about 53 mm (2.1 in) of precipitation over 10 days. With an average humidity of 90%, it's a great time to bundle up and enjoy the cozy atmosphere!
In December in Castrillo de Don Juan, the average temperature is 6°C (42°F). Maximum temperatures can reach 17°C (63°F), while minimums can drop as low as -3°C (26°F). Travelers should be prepared for a range of temperatures, ensuring they pack both warmer and lighter clothing for their visit.
In Castrillo de Don Juan in December, the precipitation amount is 53 mm (2.1 in) spread over a duration of 10 days.
In Castrillo de Don Juan in December, humidity is 90%. With an average temperature of 6°C (42°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious and causing your clothes to cling uncomfortably, which can be quite challenging for traveling.
In Castrillo de Don Juan 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 Castrillo de Don Juan, you can visit Hourly UV Index in Castrillo de Don Juan.
UV Risk Categories
Weather in Castrillo de Don Juan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castrillo de Don Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (39°F) | 36 mm (1.4 inches) | 90% | moderate |
| February Weather | 6°C (44°F) | 46 mm (1.8 inches) | 86% | moderate |
| March Weather | 8°C (47°F) | 51 mm (2.0 inches) | 79% | high |
| April Weather | 11°C (51°F) | 83 mm (3.2 inches) | 74% | very high |
| May Weather | 15°C (59°F) | 55 mm (2.1 inches) | 71% | very high |
| June Weather | 19°C (67°F) | 51 mm (2.0 inches) | 63% | extreme |
| July Weather | 23°C (73°F) | 20 mm (0.8 inches) | 59% | extreme |
| August Weather | 22°C (73°F) | 16 mm (0.6 inches) | 58% | very high |
| September Weather | 18°C (65°F) | 30 mm (1.2 inches) | 65% | very high |
| October Weather | 13°C (56°F) | 47 mm (1.9 inches) | 77% | high |
| November Weather | 8°C (46°F) | 65 mm (2.6 inches) | 87% | moderate |
| December Weather | 6°C (42°F) | 53 mm (2.1 inches) | 90% | low |