High-UV Destinations Where the Index Hits 11+ Year-Round
Some destinations sit in the UV Index's 'Extreme' zone every single day — pack for them like you would for the surface of a much harsher sun.
Equatorial and high-altitude locations such as the Andes can push the UV Index past 14 at midday — far into the 'Extreme' category (UV Index 11+) — all year.
The World Health Organization classifies a UV Index of 11 or above as 'Extreme' and urges avoiding the midday sun and using comprehensive protection, while NASA notes both higher altitude and lower latitude intensify ground-level UV.
Questions we get a lot
Where is the UV Index highest in the world?
The most extreme readings occur where high altitude and low latitude combine, such as the tropical Andes, where the midday UV Index can climb past 14. NASA explains that both proximity to the equator and higher elevation intensify ground-level UV. These spots sit deep in the WHO's 'Extreme' category, defined as UV Index 11 or above.
How should I protect myself in an Extreme UV destination?
The World Health Organization advises avoiding the sun during midday hours and using a combination of shade, protective clothing, a wide-brimmed hat, sunglasses, and broad-spectrum sunscreen when the UV Index reaches 11 or above. In Extreme-UV locations, plan for shorter exposures and frequent reapplication. Treat these trips as needing far more protection than a typical day at home.
r/travel: 'Planning a trip to the Andes and someone said the UV index there hits like 14 — is that real and how do I even prep for that?'