UV Index
UV Index
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Today's UV index in Honolulu, 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.
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.
Read more here about the climate and sun exposure in and around 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.
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.
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.
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.