UVI.today is a free, privacy-focused service that helps people understand ultraviolet radiation and plan safer time outdoors. Its website provides current UV index readings and hourly forecasts for more than 200,000 cities worldwide, alongside daily peak times, protection windows, and trends up to five days ahead. Visitors can explore a live, color-coded world map, browse cities by continent, and check typical UV levels by month to see how conditions change through the year.

The service pairs forecasts with practical sun-protection guidance based on the World Health Organization’s UV Index recommendations, explaining what different levels mean and when to seek shade or use protective clothing and sunscreen. Its UV data is based on satellite-driven information from the Copernicus Atmosphere Monitoring Service, with weather data from Open-Meteo models. Designed to be fast and lightweight, UVI.today requires no sign-up and states that it uses no cookies or user tracking. The site is focused on making essential UV information accessible at a glance, helping users choose when and how to protect their skin and eyes.