Measuring instruments used for current observations and data reporting
Land-based (in situ) observations are collected from instruments sited at locations on every continent. They include temperature, dew point, relative humidity, precipitation, wind speed and direction, visibility, atmospheric pressure, and types of weather occurrences such as hail, fog, and thunder. NCDC provides a broad level of service associated with in situ observations. These include data collection, quality control, archive, and removal of biases associated with factors such as urbanization and changes in instrumentation through time. Data on sub-hourly, hourly, daily, monthly, annual, and multiyear timescales are available.
Datasets and Products
Access NCDC's land-based datasets directly.
Find a Station
Locate a station by using either a map tool or a location and data search tool.
Find details such as begin/end date for a station and when there was a change in equipment or siting.
Climate Data Online (CDO)
The web access application for NCDC's archive of weather and climate data.
Monthly publications for a variety of datasets along with serial publications and other documents.
NCDC Web Service
These web services, set up by NCDC, allow users to have programmatic access to NCDC data and use custom and standard implementations such as OGC GIS Web Services (WMS, WFS, WCS) and OPeNDAP. Some services allow users to download data in a variety of formats such as CSV, XML, Shapefile, KMZ, and NetCDF.
FTP Bulk Access