Thanks to SMG Macau and its UV Historical Database, as well as LibreOffice and their Pivot Table function, above chart has been created. It is showing the measured UV Index of Macau at noon time across the years. There are gaps in the records. As expected, summer is high (up to 12) whereas winter is low (sometimes as low as 2). To be fair, displayed value is an AVERAGE of measured UV index figures in between 12:00 and 13:00 (4 measure points, average formula used).