Last updated: March 2, 2024
The weather in San Juan, Peru, during January is characterized by an average temperature of 12°C (54°F). Highs can soar to 20°C (68°F), while lows may dip to 6°C (43°F). Typically, the humidity level in San Juan throughout January hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In January, San Juan averages 304 mm (12.0 inches) of rainfall, typically over the course of 24 rainy days. The month enjoys an average of 12 hours 28 minutes of daylight, with the sun shining for approximately 6 hours 55 minutes each day. Additionally, there is a 10% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In January, the UV Index in San Juan reaches a maximum of 17, 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 | 3 | 7 | 12 | 15 | 17 | 17 | 14 | 10 | 5 | 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 | ||||||