Skip to main content
U.S. flag

An official website of the United States government

United States Historical Climatology Network (USHCN), Version 2.5

Published by DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 06:41 AM | Dataset Last Updated: October 01, 2012 at 12:00 AM
The U.S. Historical Climatology Network Monthly Data, Version 2.5 consists of precipitation and temperature data "corrected" for changes in station location, instrumentation, and observing practices. The vast majority of stations are from the NOAA Cooperative Observer Program (COOP) Network. Stations have been selected according to coverage, length of data record and completeness, and historical stability. Data includes sets of Maximum, Minimum and Average Temperature and Precipitation data that are either (1) raw (non-adjusted though flagged for possible quality issues), (2) adjusted due to time of observation bias (TOB) or (3) put through the Pairwise Homogenization Algorithm (PHA). The data also is archived with station information and source code for reading the data.

Resources

10 resources available

  • NCEI Dataset Landing Page

    TEXT/HTML
    Visit Page

  • NCEI Direct Download

    TEXT/HTML
    Visit Page

  • Dataset README

    TEXT
    Download

  • Dataset STATUS

    TEXT
    Download

  • USHCN Web site

    TEXT/HTML
    Visit Page

  • Science Paper

    PLACEHOLDER/VALUE
    Download

  • United States Historical Climatology Network (USHCN), Version 2.0 (version superseded) Landing Page

    TEXT/HTML
    Visit Page

  • Global Change Master Directory (GCMD) Keywords

    TEXT/HTML
    Visit Page

  • GCOS Essential Climate Variables

    TEXT/HTML
    Visit Page

  • NOAA National Centers for Environmental Information (NCEI)

    TEXT/HTML
    Visit Page

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Complete Metadata
@type dcat:Dataset
accessLevel non-public
accrualPeriodicity R/P1W
contactPoint 
{
  "fn": "NOAA National Centers for Environmental Information",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:ncei.orders@noaa.gov"
}
describedByType application/octet-steam
description The U.S. Historical Climatology Network Monthly Data, Version 2.5 consists of precipitation and temperature data "corrected" for changes in station location, instrumentation, and observing practices. The vast majority of stations are from the NOAA Cooperative Observer Program (COOP) Network. Stations have been selected according to coverage, length of data record and completeness, and historical stability. Data includes sets of Maximum, Minimum and Average Temperature and Precipitation data that are either (1) raw (non-adjusted though flagged for possible quality issues), (2) adjusted due to time of observation bias (TOB) or (3) put through the Pairwise Homogenization Algorithm (PHA). The data also is archived with station information and source code for reading the data.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "NCEI Dataset Landing Page",
    "accessURL": "https://doi.org/10.7289/V56W98B4",
    "mediaType": "text/html",
    "description": "Landing page for the dataset.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NCEI Direct Download",
    "accessURL": "https://www.ncei.noaa.gov/data/us-historical-climatology-network/2.5/",
    "mediaType": "text/html",
    "description": "Direct download for dataset files.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Dataset README",
    "format": "TEXT",
    "mediaType": "text/plain",
    "description": "Please refer to the README file for more information about the dataset.",
    "downloadURL": "https://www.ncei.noaa.gov/pub/data/ushcn/v2.5/readme.txt",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Dataset STATUS",
    "format": "TEXT",
    "mediaType": "text/plain",
    "description": "Please refer to STATUS document for the most up-to-date information about the dataset status.",
    "downloadURL": "https://www.ncei.noaa.gov/pub/data/ushcn/v2.5/status.txt",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "USHCN Web site",
    "accessURL": "https://www.ncdc.noaa.gov/ushcn/introduction",
    "mediaType": "text/html",
    "description": "Project page with dataset information.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Science Paper",
    "mediaType": "placeholder/value",
    "description": "Paper describing the Version 2 release of the dataset. Version 2 and 2.5 are very similar. See documentation for more information.",
    "downloadURL": "https://doi.org/10.1175/2008BAMS2613.1",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "United States Historical Climatology Network (USHCN), Version 2.0 (version superseded) Landing Page",
    "accessURL": "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00688/html",
    "mediaType": "text/html",
    "description": "Superseded dataset landing page. This version of the data should not be used except in rare cases (e.g., when reproducing studies that used this earlier version).",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Global Change Master Directory (GCMD) Keywords",
    "accessURL": "https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords",
    "mediaType": "text/html",
    "description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "GCOS Essential Climate Variables",
    "accessURL": "https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables",
    "mediaType": "text/html",
    "description": "Overview of the GCOS Essential Climate Variables.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NOAA National Centers for Environmental Information (NCEI)",
    "accessURL": "https://www.ncei.noaa.gov",
    "mediaType": "text/html",
    "description": "NCEI home page with information, data access and contact information.",
    "describedByType": "application/octet-stream"
  }
]
identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C00895.xml
isPartOf The U.S. Historical Climatology Network Monthly Temperature Data, Version 2
issued 2012-10-01T00:00:00.000+00:00
keyword 
[
  "Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Maximum/Minimum Temperature",
  "Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature",
  "Earth Science > Atmosphere > Precipitation > Precipitation Amount",
  "Atmospheric - Surface - Air Temperature",
  "Atmospheric - Surface - Precipitation",
  "Continent > North America > United States Of America",
  "Vertical Location > Land Surface",
  "HCN > Historical Climatology Network",
  "Thermometers",
  "Rain Gauges",
  "Meteorological Stations",
  "Weekly - < Monthly",
  "Point Resolution",
  "Point Resolution",
  "DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce",
  "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce"
]
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2012-10-01T00:00:00.000+00:00
publisher 
{
  "name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
  "@type": "org:Organization"
}
references 
[
  "https://doi.org/10.1175/2008BAMS2613.1",
  "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00688/html"
]
rights otherRestrictions
spatial -55.0,23.0,-125.0,52.0
temporal 1891-01-01T00:00:00+00:00/1891-01-01T00:00:00+00:00
theme 
[
  "geospatial"
]
title United States Historical Climatology Network (USHCN), Version 2.5

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov