NCDC's land-based (in situ) datasets are developed from data collected across the United States and globally. Data availability varies by data type and station, and some have periods of record of more than a century. Any data product ordered from NCDC may be certified for court, but only the more commonly certified products can be certified for court online. For ordering certified copies of items where certifications are not offered online, please contact NCDC.
Quality Controlled Local Climatological Data (QCLCD)
Hourly, daily, and monthly summaries for approximately 1,600 U.S. locations; includes Automated Surface Observing System (ASOS) and Automated Weather Observing System (AWOS) stations. (Click here to order multiple types of Local Climatological Data together.)
Cooperative Observer Network (COOP)
Data from a network of more than 10,000 volunteer observers across the United States and its territories. Data usually consist of daily maximum and minimum temperatures, snowfall, and 24-hour precipitation totals and may include additional hydrological or meteorological data such as evaporation or soil temperatures. These data are also part of the GHCN-Daily dataset and a subset are included as part of the USHCN dataset, which are listed below.
30-year averages of weather data collected from thousands of stations nationwide.
U.S. Historical Climatology Network (USHCN)
A subset of the Cooperative Observer Network, this dataset provides summary of the month temperature and precipitation observations for 1,218 stations across the contiguous United States. Temperature observations have been homogeneity corrected to remove biases associated with non-climatic influences such as changes in instrumentation and observing practices and changes to the environment including station relocations.
Global Historical Climatology Network (GHCN)
Consists of two datasets; GHCN-Monthly and GHCN-Daily, containing summary of the month and summary of the day data from multiple sources combined to provide the most complete record of the Earth's climate since instrumental measurements began. Some observations as early as the late 1600s.
Global Summary of the Day (GSOD)
The data used in building these daily summaries are obtained from the USAF Climatology Center. The latest daily summary data are updated approximately daily. Data from more than 9,000 stations are included.
U.S. Climate Reference Network (USCRN)
Monthly, daily, hourly, and sub-hourly data from NOAA's premiere surface reference network. The contiguous U.S. network of 114 stations was completed in 2008. There are two USCRN stations in Hawaii, and deployment of a network of 29 stations in Alaska continues.
Global Observing Systems Information Center (GOSIC)
A collection of climate observations from stations designated by the World Meteorological Organization to provide information on the global climate system.
Integrated Surface Database (ISD)
Global hourly and synoptic observations compiled from numerous sources into a single common ASCII format and common data model; data from than 20,000 stations.
Automated Surface Observing Systems (ASOS)
Sensor data from over 900 sites in the U.S.
Automated Weather Observing System (AWOS)
These systems are among the oldest automated weather stations and predate ASOS. They generally report at 20-minute intervals and do not report special observations for rapidly changing weather conditions.
The National Solar Radiation Database provides extensive solar radiation information to solar planners and designers, building architects and engineers, renewable energy analysts, and others.