More Observatory’s datasets released on Government Open Data Portal and Common Spatial Data Infrastructure (CSDI) portal (2025)

26 June 2025

The Hong Kong Observatory (HKO) has been releasing weather data in machine-readable format on its website since 2012.  The data are also available on the Open Data Portal (This link will open in a new windowDATA.GOV.HK) and CSDI portal (This link will open in a new windowPORTAL.CSDI.GOV.HK).  With a view to opening up more data for free use by the public, HKO released 4 new datasets today (26 June 2025):

• Daily grass minimum temperature (This link will open in a new windowOpen Data/This link will open in a new window CSDI)
• Daily mean sea temperature (This link will open in a new windowOpen Data/This link will open in a new window CSDI)
• Daily number of hours of reduced visibility (This link will open in a new windowOpen Data/This link will open in a new window CSDI)
• Hourly ambient gamma radiation level in Hong Kong (This link will open in a new windowOpen Data/This link will open in a new window CSDI) 

All datasets can also be found in the This link will open in a new windowHKO website.