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UV Index in Jamestown

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Today's UV index in Jamestown, Saint Helena, Ascension and Tristan da Cunha Saint Helena, Ascension and Tristan da Cunha will be up to 10.3, indicating a very high 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

With a UV index of 10.3 in Jamestown, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.

Jamestown's UV Index

The UV index in Jamestown, Saint Helena typically ranges from low to moderate, with values rarely exceeding 6.

Weather Seasons

UV index

Jamestown has a tropical climate with two main seasons: the warm, wet season from January to April, and the cool, dry season from May to October.

Jamestown's Climate

Compared to its region and neighboring countries, Jamestown has a unique climate with milder temperatures and more consistent rainfall than other islands in the South Atlantic. It receives less rainfall and has cooler temperatures than nearby countries in tropical Africa.

Annual Sun Radiation

The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Jamestown. 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 Jamestown (Saint Helena, Ascension and Tristan da Cunha) 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.