December Weather in San Juan

Last updated: March 2, 2024

The weather in San Juan, Peru, during December is characterized by an average temperature of 19°C (66°F). Highs can soar to 23°C (74°F), while lows may dip to 15°C (60°F). Typically, the humidity level in San Juan throughout December hovers around 83%.

15°C (60°F)

Minimum temperature

19°C (66°F)

Average temperature

23°C (74°F)

Maximum temperature

83%

Humidity

Precipitation and Sunshine hours

In December, San Juan averages 6 mm (0.2 inches) of rainfall, typically over the course of 0 rainy days. The month enjoys an average of 13 hours 0 minutes of daylight, with the sun shining for approximately 10 hours 47 minutes each day. Additionally, there is a 18% probability of sunny days during this period.

6 mm (0.2 inches)

Precipitation

0 rainy days

Rainy days

10 hours 47 minutes

Sunshine hours

18%

Chance of sun

UV Index

In December, the UV Index in San Juan reaches a maximum of 15, 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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  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 4 8 12 14 15 13 10 7 3 1 1 0
Exposure Low Moderate VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare San Juan's Climate with Cities Worldwide