Last updated: August 27, 2025
In San Isidro, Spain, the average temperature in December tends to be a comfortable 12°C (54°F). You'll experience a range of weather, with minimum temperatures dipping to -1°C (31°F) and a pleasant maximum of 24°C (75°F). Expect about 16 mm (0.6 in) of precipitation spread over 3 days, while the air maintains an average humidity of 80%, creating a refreshing atmosphere.
In December in San Isidro, the average temperature is 12°C (54°F). Maximum temperatures can reach up to 24°C (75°F), while minimums can drop as low as -1°C (31°F). This diverse temperature range makes it advisable for travelers to pack both warm and light layers when visiting during this month.
In San Isidro in December, the precipitation amount is 16 mm (0.6 in), spread over a duration of 3 days.
In San Isidro in December, humidity is 80%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket that wraps around you, making it feel much cooler and damp. Traveling in these conditions might leave you feeling chilly and slightly uncomfortable, as the moisture in the air clings to your skin and clothes, turning each step into a soggy endeavor.
In San Isidro 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 Isidro, you can check the information here.
UV Risk Categories
Weather in San Isidro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Isidro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 11°C (51°F) | 36 mm (1.4 inches) | 78% | moderate |
| February Weather | 13°C (55°F) | 12 mm (0.5 inches) | 75% | moderate |
| March Weather | 14°C (58°F) | 46 mm (1.8 inches) | 64% | high |
| April Weather | 16°C (61°F) | 52 mm (2.0 inches) | 58% | very high |
| May Weather | 20°C (69°F) | 25 mm (1.0 inches) | 53% | very high |
| June Weather | 24°C (76°F) | 28 mm (1.1 inches) | 49% | extreme |
| July Weather | 27°C (81°F) | 4 mm (0.1 inches) | 51% | extreme |
| August Weather | 27°C (81°F) | 23 mm (0.9 inches) | 51% | very high |
| September Weather | 24°C (76°F) | 58 mm (2.3 inches) | 58% | very high |
| October Weather | 19°C (67°F) | 33 mm (1.3 inches) | 71% | high |
| November Weather | 15°C (59°F) | 37 mm (1.5 inches) | 76% | moderate |
| December Weather | 12°C (54°F) | 16 mm (0.6 inches) | 80% | moderate |