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 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%.

8°C (47°F)

Minimum temperature

13°C (55°F)

Average temperature

18°C (65°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

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.

129 mm (5.1 inches)

Precipitation

26 rainy days

Rainy days

9 hours 41 minutes

Sunshine hours

25%

Chance of sun

UV Index

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.

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 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

Compare San Juan's Climate with Cities Worldwide