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 (DATA.GOV.HK) and CSDI portal (PORTAL.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 (Open Data/ CSDI)
• Daily mean sea temperature (Open Data/ CSDI)
• Daily number of hours of reduced visibility (Open Data/ CSDI)
• Hourly ambient gamma radiation level in Hong Kong (Open Data/ CSDI) 

All datasets can also be found in the HKO website.