Last updated: August 27, 2025
In Alcazar de San Juan, Spain, the average temperature in December hovers around 7°C (45°F). Expect nighttime lows to dip to -4°C (26°F) while daytime highs can reach up to 18°C (65°F). During this time, you can anticipate 36 mm (1.4 in) of precipitation spread over 7 days, alongside an average humidity of 86%.
In December in Alcazar de San Juan, the average temperature is 7°C (45°F). The maximum can reach 18°C (65°F), and the minimum can be as low as -4°C (26°F). It's advisable to pack layers and prepare for varying temperatures while traveling during this time.
In Alcazar de San Juan in December, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.
In Alcazar de San Juan in December, humidity is 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.
In Alcazar de San Juan 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 Alcazar de San Juan, you can check the information here.
UV Risk Categories
Weather in Alcazar de San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Alcazar de San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 30 mm (1.2 inches) | 85% | moderate |
| February Weather | 9°C (48°F) | 24 mm (0.9 inches) | 78% | moderate |
| March Weather | 11°C (51°F) | 41 mm (1.6 inches) | 66% | high |
| April Weather | 13°C (56°F) | 71 mm (2.8 inches) | 60% | very high |
| May Weather | 19°C (66°F) | 32 mm (1.3 inches) | 56% | very high |
| June Weather | 24°C (76°F) | 12 mm (0.5 inches) | 44% | extreme |
| July Weather | 28°C (82°F) | 9 mm (0.4 inches) | 44% | extreme |
| August Weather | 27°C (82°F) | 16 mm (0.6 inches) | 42% | very high |
| September Weather | 22°C (72°F) | 24 mm (1.0 inches) | 53% | very high |
| October Weather | 16°C (62°F) | 41 mm (1.6 inches) | 70% | high |
| November Weather | 10°C (50°F) | 55 mm (2.2 inches) | 83% | moderate |
| December Weather | 7°C (45°F) | 36 mm (1.4 inches) | 86% | moderate |