Last updated: August 27, 2025
In December, the average temperature in San Martin de Montalban, Spain is a brisk 7°C (45°F). Expect chilly nights, with temperatures dipping to a minimum of -4°C (25°F), while the warmth can reach a comfortable 18°C (64°F) during the day. Prepare for occasional showers, as 48 mm (1.9 in) of precipitation typically falls over about 7 days, accompanied by a high average humidity of 86%.
In December in San Martin de Montalban, the average temperature is 7°C (45°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop as low as -4°C (25°F). Be prepared for a range of temperatures if you plan to visit during this time.
In San Martin de Montalban in December, the total precipitation amount is 48 mm (1.9 in) over a span of 7 days.
In San Martin de Montalban 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 San Martin de Montalban 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 San Martin de Montalban, you can check the information here.
UV Risk Categories
Weather in San Martin de Montalban varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Martin de Montalban, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 36 mm (1.4 inches) | 85% | moderate |
| February Weather | 8°C (47°F) | 36 mm (1.4 inches) | 78% | moderate |
| March Weather | 10°C (51°F) | 71 mm (2.8 inches) | 66% | high |
| April Weather | 13°C (55°F) | 97 mm (3.8 inches) | 60% | very high |
| May Weather | 18°C (64°F) | 44 mm (1.7 inches) | 56% | very high |
| June Weather | 22°C (72°F) | 20 mm (0.8 inches) | 44% | extreme |
| July Weather | 26°C (78°F) | 20 mm (0.8 inches) | 44% | extreme |
| August Weather | 26°C (79°F) | 22 mm (0.9 inches) | 42% | very high |
| September Weather | 21°C (71°F) | 42 mm (1.7 inches) | 53% | very high |
| October Weather | 16°C (61°F) | 55 mm (2.2 inches) | 70% | high |
| November Weather | 10°C (50°F) | 79 mm (3.1 inches) | 83% | moderate |
| December Weather | 7°C (45°F) | 48 mm (1.9 inches) | 86% | moderate |