The UV index forecasts how strong the sun's ultraviolet radiation will be. Check it the way you check the temperature, and plan your protection around the peak.
Scale and protective steps follow the US Environmental Protection Agency UV Index Scale and the American Academy of Dermatology. Forecast data by Open-Meteo.com (CC BY 4.0). Your location is used only in your browser to request the forecast. AMI does not receive or store it.
The scale, the shadow rule, and what UPF means.
SPF, broad spectrum, and how much to use.
What glass blocks and what it lets through.
