Last updated: March 2, 2024
The weather in San Juan, Peru, during May is characterized by an average temperature of 12°C (55°F). Highs can soar to 18°C (64°F), while lows may dip to 5°C (41°F). Typically, the humidity level in San Juan throughout May hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, San Juan averages 60 mm (2.3 inches) of rainfall, typically over the course of 18 rainy days. The month enjoys an average of 11 hours 29 minutes of daylight, with the sun shining for approximately 10 hours 45 minutes each day. Additionally, there is a 60% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In May, the UV Index in San Juan reaches a maximum of 14, 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 | 6 | 10 | 13 | 14 | 12 | 9 | 5 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 30 min | 45 min | |||||