Last updated: August 27, 2025
In San Cristobal, Peru, the average temperature in December hovers around 5°C (41°F), with a minimum dipping to -5°C (24°F) and a maximum reaching 13°C (55°F). Expect considerable rain, with 236 mm (9.3 in) of precipitation spread across 28 days, contributing to an average humidity of 90%. Prepare for cool, damp days!
In December in San Cristobal, the average temperature is 5°C (41°F), with a maximum of 13°C (55°F) and a minimum that can drop as low as -5°C (24°F). Be sure to pack warm clothing and be prepared for chilly conditions while exploring this destination.
In San Cristobal in December, the precipitation amount is 236 mm (9.3 in) over a period of 28 days.
In San Cristobal in December, humidity is 90%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that clings to your skin, making travel feel more strenuous as you navigate the cold air mixed with moisture, potentially leaving you feeling sluggish and uncomfortable.
In San Cristobal in December, the maximum UV index reaches 20, which falls under the extreme Exposure Category. This means that the time to burn is just 10 minutes. To stay informed about the hourly UV Index in San Cristobal, you can visit Hourly UV Index in San Cristobal.
UV Risk Categories
Weather in San Cristobal varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Cristobal, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 219 mm (8.6 inches) | 91% | extreme |
| February Weather | 4°C (40°F) | 255 mm (10.0 inches) | 90% | extreme |
| March Weather | 4°C (40°F) | 294 mm (11.6 inches) | 91% | extreme |
| April Weather | 4°C (40°F) | 146 mm (5.8 inches) | 89% | extreme |
| May Weather | 4°C (39°F) | 91 mm (3.6 inches) | 85% | extreme |
| June Weather | 3°C (38°F) | 32 mm (1.3 inches) | 65% | extreme |
| July Weather | 2°C (37°F) | 26 mm (1.0 inches) | 47% | extreme |
| August Weather | 3°C (37°F) | 45 mm (1.8 inches) | 38% | extreme |
| September Weather | 3°C (38°F) | 99 mm (3.9 inches) | 40% | extreme |
| October Weather | 4°C (39°F) | 156 mm (6.2 inches) | 56% | extreme |
| November Weather | 5°C (41°F) | 197 mm (7.8 inches) | 76% | extreme |
| December Weather | 5°C (41°F) | 236 mm (9.3 inches) | 90% | extreme |