Last updated: August 27, 2025
In December, the average temperature in Santiago, Mexico is a pleasant 22°C (72°F), making it an inviting destination. Visitors can expect temperatures to vary, with a minimum low of 11°C (52°F) and a maximum high of 33°C (92°F). While enjoying the warm weather, you might encounter an average precipitation of 11 mm (0.4 in) spread over just 1 day, alongside a relatively high average humidity of 88%. Prepare accordingly for a delightful experience!
In December in Santiago, the average temperature is 22°C (72°F). Maximums can reach 33°C (92°F), while minimums can dip as low as 11°C (52°F). This makes Santiago a pleasant destination for travelers seeking comfortable weather with some warmth during the day and cooler evenings.
In Santiago in December, the precipitation amount is 11 mm (0.4 in) over the course of one day.
In Santiago in December humidity is 88%. With an average temperature of 22°C (72°F), this humidity feels like a warm, steamy embrace that clings to your skin, making outdoor exploration a sweaty challenge but also a vibrant experience as the air is thick with the scent of nature and vibrant local life.
In Santiago in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Santiago.
UV Risk Categories
Weather in Santiago varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santiago, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (72°F) | 6 mm (0.2 inches) | 83% | very high |
| February Weather | 24°C (75°F) | 3 mm (0.1 inches) | 76% | extreme |
| March Weather | 25°C (78°F) | 4 mm (0.2 inches) | 66% | extreme |
| April Weather | 27°C (81°F) | 22 mm (0.9 inches) | 59% | extreme |
| May Weather | 27°C (81°F) | 109 mm (4.3 inches) | 64% | extreme |
| June Weather | 25°C (78°F) | 223 mm (8.8 inches) | 69% | extreme |
| July Weather | 26°C (79°F) | 103 mm (4.1 inches) | 82% | extreme |
| August Weather | 26°C (78°F) | 169 mm (6.7 inches) | 87% | extreme |
| September Weather | 25°C (77°F) | 223 mm (8.8 inches) | 87% | extreme |
| October Weather | 24°C (76°F) | 189 mm (7.4 inches) | 88% | extreme |
| November Weather | 23°C (74°F) | 22 mm (0.9 inches) | 88% | very high |
| December Weather | 22°C (72°F) | 11 mm (0.4 inches) | 88% | very high |