U.S. Climate Normals 2020: U.S. Monthly Climate Normals (2006-2020)

browse graphicNOAA Logo
The U.S. Monthly Climate Normals for 2006 to 2020 are 15-year averages of meteorological parameters that provide users supplemental normals for specialized applications 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 Monthly 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)). All data utilized in the computation of the 2006-2020 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.
  • Cite as: Arguez, A., I. Durre, S. Applequist, R. Vose, M. Squires, X. Yin, R. Heim, and T. Owen, 2012: NOAA's 1981-2010 climate normals: An overview. Bull. Amer. Meteor. Soc., 93, 1687-1697.
  • NCEI DSI 2049_01
  • gov.noaa.ncdc:C01624
Download Data
Distribution Formats
  • CSV (Version: 1.0)
DistributorCustomer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Principal Investigator Michael Palecki
Project Manager for Normals
National Centers for Environmental Information/NOAA
8282714340
michael.palecki@noaa.gov
Time Period2006-01 to 2020-12 (time interval: 1-month)
Spatial Reference Systemurn:ogc:def:crs:EPSG::4269
Spatial Bounding Box Coordinates
N: 72.0
S: -15.0
E: -64.0
W: 134.0
Spatial Coverage Map
Dataset Information
General Documentation
Associated Resources
Publication Dates
  • publication: 2021-05
  • creation: 2021-02-18
Edition1.0
Data Presentation Form Digital document - digital representation of a primarily textual item (can contain illustrations also)
Dataset Progress StatusComplete - production of the data has been completed
Data Update Frequency As needed
PurposeNOAA NCEI and NOAA NWS will be primary users of this dataset. Other users include many federal, state, and local government agencies; corporations and individuals in all U.S. Economic Sectors, and the general public. The archived data will be be used to compare local climates across the United States. It will also be used to place current observations in context by allowing the calculation of anomalies (differences from normals) from a consistent reference period of record.
Use Limitations
  • These normals are calculated at weather stations and are limited in their applicability at locations in between stations as distance from the station increases horizontally and vertically.
Dataset Citation
  • Cite as: Arguez, A., I. Durre, S. Applequist, R. Vose, M. Squires, X. Yin, R. Heim, and T. Owen, 2012: NOAA's 1981-2010 climate normals: An overview. Bull. Amer. Meteor. Soc., 93, 1687-1697.
Cited Authors
  • Michael Palecki
    National Centers for Environmental Information/NOAA
  • Imke Durre
    National Centers for Environmental Information/NOAA
  • Jay Lawrimore
    National Centers for Environmental Information/NOAA
  • Scott Applequist
    National Centers for Environmental Information/NOAA
Originators
  • Scott Applequist
    National Centers for Environmental Information/NOAA
Principal Investigators
  • Michael Palecki
    National Centers for Environmental Information/NOAA
Resource Providers
  • Imke Durre
    National Centers for Environmental Information/NOAA
  • Jay Lawrimore
    National Centers for Environmental Information/NOAA
Publishers
    Publisher information not available.
Theme keywordsGlobal Change Master Directory (GCMD) Science Keywords
  • Earth Science > Climate Indicators
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
  • Atmospheric - Surface - Air Temperature
  • Atmospheric - Surface - Precipitation
Keyword Thesaurus Title
  • Normals
Data Center keywordsGlobal Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Place keywordsGlobal Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States Of America
  • Ocean > Pacific Ocean > Central Pacific Ocean
Data Resolution keywordsGlobal Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • Point Resolution
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • Point Resolution
Stratum keywordsGlobal Change Master Directory (GCMD) Location Keywords
  • Vertical Location > Land Surface
Use Constraints
  • Cite as: Arguez, A., I. Durre, S. Applequist, R. Vose, M. Squires, X. Yin, R. Heim, and T. Owen, 2012: NOAA's 1981-2010 climate normals: An overview. Bull. Amer. Meteor. Soc., 93, 1687-1697.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage StatementThe Monthly Normals are generated from Global Historical Climatology Network Monthly V.4 and Daily V.3 using Fortran software routines developed for the 1981-2010 normals production and updated for technical improvements.
Processing EnvironmentThe input files are available in an ascii format, piped to scripts and programs on normalswork-dev, and completed as *.csv files in bulk variable storage and station file storage formats. They are then validated and quality controlled, and shipped to climon-prod for shipping to archive directories and online storage directories.
Last Modified: 2021-05-07
For questions about the information on this page, please email: ncei.orders@noaa.gov