Description - Coverage
GHCN-Daily contains over 43,000 stations, approximately 8500 of which are regularly updated with observations from within the last month.
While most of these sites report precipitation
(
see map of precipitation stations)
, daily maximum and minimum temperatures are available at more than 23,000 of them (
see map of temperature stations)
, and over 24,000 contain records of snowfall and/or snow depth (
see map of snow stations
). Particularly for temperature, the density of stations is greatest over North America. Dense
networks of precipitation observations are also found in Brazil, India, and South Africa, although many of these records are purely historical and are not being updated on a regular basis. Snowfall is currently only available for stations operated by the United States, and all snow depth observations for international stations originate from the synoptic reports in the Global Summary of the Day.
For the periods of record of individual stations and elements, see the GHCN-Daily inventory.
