U.S. Climate Normals 2020: U.S. Annual/Seasonal Climate Normals (1991-2020)

Description

The U.S. Annual/Seasonal Climate Normals for 1991 to 2020 are 30-year averages of meteorological parameters that provide users the information needed to understand typical climate conditions for thousands of locations across the United States, as well as U.S. Territories and Commonwealths, and the Compact of Free Association nations. The stations used include those from the NWS Cooperative Observer Program (COOP) Network as well as some additional stations that have a Weather Bureau Army-Navy (WBAN) station identification number, including stations from the U.S. Climate Reference Network (USCRN) and other automated observation stations. In addition, precipitation normals for stations from the U.S. Snow Telemetry (SNOTEL) Network and the citizen-science Community Collaborative Rain, Hail and Snow (CoCoRaHS) Network are also available. The Annual/Seasonal Climate Normals dataset includes various derived products such as air temperature normals (including maximum and minimum temperature normals, heating and cooling degree day normals, and others), precipitation normals (including precipitation and snowfall totals, and percentiles, frequencies and other statistics of precipitation, snowfall, and snow depth), and agricultural normals (growing degree days (GDDs), lengths of growing seasons, probabilities of first or last temperature threshold exceedances. All data utilized in the computation of the 1991-2020 Climate Normals were taken from the Global Historical Climatology Network-Daily and -Monthly datasets. Temperatures were homogenized, adjusted for time-of-observation, and made serially complete where possible based on information from nearby stations. Precipitation totals were also made serially complete where possible based using nearby stations. The source datasets (including intermediate datasets used in the computation of products) are also archived at NOAA NCEI. A comparatively small number of station normals sets (~50) have been added as Version 1.0.1 to correct quality issues or because additional historical data during the 1991-2020 period has been ingested.

Resources

Name Format Description Link
21 Information on Microsoft Azure data access. https://microsoft.github.io/AIforEarthDataSets/data/noaa-climatenormals.html
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 Paper DOI https://doi.org/10.1175/JAMC-D-13-051.1
0 Description of the data and related resources. https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals
0 Search data via the interface https://www.ncei.noaa.gov/access/search/data-search/normals-annualseasonal-1991-2020
0 Paper DOI https://doi.org/10.1175/BAMS-D-11-00197.1
0 Direct download for the dataset. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 Overview of the GCOS Essential Climate Variables. https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables
0 Landing page for the dataset. https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C01619/html
33 Normals User Guide that provides product descriptions and formats for all data and products produced and made available to users. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/doc/Normals_ANN_Documentation_1991-2020.pdf
33 The science and methodologies used to generate official climate normals for the United States. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/doc/Normals_Calculation_Methodology_2020.pdf
47 This document describes the technical layout of the CSV normals files in both the individual, by-station, format and the grouped by-variable format. It also provides a guide to the location of the variables within the larger by-variable tar files. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/doc/Readme_By-Variable_By-Station_Normals_Files.txt
8 This sample data file shows how the data are formatted in CSV and is for example purposes only. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/doc/Normals_ANN_1991-2020_sample.csv
33 This sample data file shows how the data are formatted in PDF and is for example purposes only. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/doc/Normals_ANN_1991-2020_sample.pdf
0 Information on AWS data access. https://registry.opendata.aws/noaa-climate-normals/
21 Browse view to explore the S3 bucket. https://noaa-normals-pds.s3.amazonaws.com/index.html#normals-annualseasonal/1991-2020/
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 Related dataset web page with general information and access links for that dataset. https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals#tab-1027
0 Related dataset web page with general information and access links for that dataset. https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals#tab-331

Tags

  • vertical location
  • precipitation
  • united states of america
  • land surface
  • atmospheric temperature
  • nesdis
  • precipitation amount
  • atmosphere
  • continent
  • noaa
  • air temperature
  • north america
  • u.s. department of commerce
  • earth science
  • ocean
  • normals
  • climate indicators
  • doc/noaa/nesdis/ncei
  • atmospheric - surface - air temperature
  • central pacific ocean
  • atmospheric - surface - precipitation
  • pacific ocean
  • surface temperature
  • point resolution
  • national centers for environmental information

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