Last updated: March 2, 2024
The weather in San Juan, Peru, during December is characterized by an average temperature of 13°C (55°F). Highs can soar to 18°C (65°F), while lows may dip to 8°C (47°F). Typically, the humidity level in San Juan throughout December hovers around 87%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, San Juan averages 129 mm (5.1 inches) of rainfall, typically over the course of 26 rainy days. The month enjoys an average of 12 hours 52 minutes of daylight, with the sun shining for approximately 9 hours 41 minutes each day. Additionally, there is a 25% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in San Juan reaches a maximum of 18, 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 | 2 | 5 | 9 | 14 | 17 | 18 | 16 | 13 | 8 | 4 | 2 | 1 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 30 min | 45 min | ||||||