March Weather in San Juan

Last updated: March 2, 2024

The weather in San Juan, United States, during March is characterized by an average temperature of 6°C (43°F). Highs can soar to 20°C (69°F), while lows may dip to -8°C (18°F). Typically, the humidity level in San Juan throughout March hovers around 66%.

-8°C (18°F)

Minimum temperature

6°C (43°F)

Average temperature

20°C (69°F)

Maximum temperature

66%

Humidity

Precipitation and Sunshine hours

In March, San Juan averages 24 mm (1.0 inches) of rainfall, typically over the course of 6 rainy days. The month enjoys an average of 11 hours 59 minutes of daylight, with the sun shining for approximately 9 hours 37 minutes each day. Additionally, there is a 66% probability of sunny days during this period.

24 mm (1.0 inches)

Precipitation

6 rainy days

Rainy days

9 hours 37 minutes

Sunshine hours

66%

Chance of sun

UV Index

In March, the UV Index in San Juan reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 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 1 2 4 6 8 9 10 9 7 4 2 1 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare San Juan's Climate with Cities Worldwide