Solar Global Horizontal Irradiance (GHI)

Monthly and annual average solar resource potential for the state of Hawaii measured in global horizontal irradiance (GHI). This data provides monthly average and annual average daily total solar resource averaged over surface cells of 0.1 degrees in both latitude and longitude, or about 10 km in size.

Apr. 2024: Hawaii Statewide GIS Program staff removed extraneous fields that had been added as part of the 2016 GIS database conversion and were no longer needed. For more information, see metadata at files.hawaii.gov/dbedt/op/gis/data/solar_resource_ghi.pdf or contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, Hi. 96804; (808) 587-2846; email: gis@hawaii.gov; Website: planning.hawaii.gov/gis .