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UV Index in San Juan

UV index


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Today's UV index in San Juan, Puerto Rico Puerto Rico will be up to 11.9, indicating a extreme level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.


Today's tips

UV index at 11.9 in San Juan means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.

San Juan's UV Index

The UV index in San Juan, Puerto Rico, is typically high due to its tropical location. On average, the UV index stays above 9 for 7 months of the year, and above 11 for 3 months.

Weather Seasons

UV index

San Juan experiences two main seasons: the dry season from December to April and the wet season from May to November. The city has an average temperature of 82°F (28°C) year-round, with minimal temperature variation.

San Juan's Climate

Compared to its region and neighboring countries, San Juan is warmer and more humid than many other Caribbean cities, with less temperature variation throughout the year due to its coastal position and tropical climate.

Annual Sun Radiation

The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in San Juan. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in San Juan (Puerto Rico) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.