Monitoring atmospheric composition & climate
Monitoring and Forecasting of Ultraviolet Radiation

The Global Solar UV index (UVI) is a measure of the intensity of UV radiation on the Earth’s surface that is relevant to effects on the human skin. The values of the index range from zero upward – the higher the index value, the greater the potential for damage to the skin and eye, and the less time it takes for harm to occur. MACC provides 4-day global forecasts of UVI. For more information see the WHO information pages about ultraviolet radiation.

Latest Forecast

UV forecast
Forecast of total-sky UV index


Clicking on the image will lead to all current global near-real-time forecasts.


Data Archive

Link to data archive



Contact details

For more details about the MACC monitoring and forecasting of UV radiation service, please contact the MACC team.