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UV Index in Honolulu, US

UV index


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Today's UV index in Honolulu, United States United States will be up to 6.6, indicating high risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

With Honolulu's UV index reaching 6.6, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours between 10 a.m. and 4 p.m., when UV rays are strongest.

Honolulu Weather

Read more here about the climate and sun exposure in and around Honolulu.

UV Index in Honolulu

The UV index in Honolulu, United States (US), can reach high levels throughout the year. In the summer months, the index can exceed 10 (very high), which means you need to take extra precautions to protect your skin and eyes from harmful ultraviolet radiation. It is crucial to wear sunscreen, protective clothing, and sunglasses, and seek shade during peak UV hours.

Weather Seasons

UV index

Honolulu experiences two main weather seasons: a warm and dry season and a slightly cooler wet season. The warm and dry season, from May to October, sees average temperatures ranging from 25 °C to 31 °C (77 °F to 88 °F). The wet season, from November to April, sees temperatures ranging from 23 °C to 27 °C (73 °F to 81 °F) with more rainfall. However, even in the wet season, there are many sunny days in Honolulu.

Honolulu's Climate

Compared to its region, Honolulu enjoys relatively mild temperatures and a comfortable climate. The warm ocean currents and trade winds help moderate the temperatures throughout the year. Unlike some parts of the US mainland, Honolulu receives abundant sunshine, with an average of over 278 sunny days per year. Its location in the tropical Pacific region gives Honolulu a unique blend of warm, tropical weather and stunning beaches.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Honolulu. 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 Honolulu (United States) 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.