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UV Index in San Juan

Day Summary

Today's UV index in San Juan, Puerto Rico Puerto Rico will be up to 11.1, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.

Last checked: 2025-06-01

Forecast

Today's tips

UV index at 11.1 in San Juan means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking 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 usually high, often ranging from 7 to 11 during midday. This means the sun's rays are very strong, especially in the summer months.

Weather Seasons

UV index

San Juan has a tropical climate with warm temperatures all year round. The rainy season is from April to November, and the dry season is from December to March. It rarely gets too cold or too hot.

San Juan's Climate

Compared to nearby Caribbean islands, San Juan's weather is fairly typical with warm temperatures and a wet season. It is generally sunnier and less rainy than places like Jamaica or the Dominican Republic.

Hourly Trend

See the UV index hour by hour for San Juan, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.

Disclaimer

* 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.