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UV Index

Notice:
Hong Kong Observatory has launched a new Ultraviolet (UV) Radiation Information Webpage in August 2018.  This webpage will be decommissioned on 31 October 2018.
Go to:
New UV Radiation Information Webpage (desktop version)
New UV Radiation Information Webpage (mobile version)


Introduction to UV radiation and UV index


What is UV radiation?
How is UV radiation measured?
What is UV index?

 

 

Last revision date: <01 Aug 2018>