Last updated: March 2, 2024
The weather in San Juan, Peru, during December is characterized by an average temperature of 12°C (54°F). Highs can soar to 20°C (69°F), while lows may dip to 5°C (41°F). Typically, the humidity level in San Juan throughout December hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, San Juan averages 413 mm (16.2 inches) of rainfall, typically over the course of 26 rainy days. The month enjoys an average of 12 hours 31 minutes of daylight, with the sun shining for approximately 8 hours 39 minutes each day. Additionally, there is a 16% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In December, the UV Index in San Juan reaches a maximum of 16, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 4 | 7 | 12 | 15 | 16 | 15 | 12 | 8 | 4 | 2 | 1 | 0 |
| Exposure | Low | Moderate | High | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 10 min | 15 min | 30 min | 45 min | ||||||