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Monthly Temperature and Precipitation Data

C.N. Williams, Jr., M.J. Menne, R.S. Vose, and D.R. Easterling
National Oceanic and Atmospheric Administration,
National Climatic Data Center,
Asheville, North Carolina

Prepared for on-line distribution by:
B.L. Jackson, L.M. Olsen, D.P. Kaiser, and T.A. Boden
Carbon Dioxide Information Analysis Center
Environmental Sciences Division
Oak Ridge National Laboratory
Oak Ridge, Tennessee 37831-6290
managed by
University of Tennessee-Battelle, LLC
for the
under contract DE-AC05-00OR22725

Data Citation

Williams, C.N., Jr., M.J. Menne, R.S. Vose, and D.R. Easterling. 2007. United States
          Historical Climatology Network Monthly Temperature and Precipitation Data.
          ORNL/CDIAC-118, NDP-019. Available on-line [] from the
          Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of
          Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/cli.ndp019

1. Background Information
2. Description and Formats of USHCN Data Files and Supporting Files
     2.1 USHCN Temperature Data Files
     2.2 USHCN Precipitation Data File
     2.3 USHCN Supporting Files
       Station Inventory File
       Station History File
       Station Area Land Use/Land Cover File
       Population Metadata Files for USHCN Stations
3. Obtaining USHCN Data Files
4. References
Appendix A: State Numbers and abbreviations Used for the 48 States in the HCN/D Database

Access Station Data

There are two ways to access station data:

1. Download various data and documentation files for the entire USHCN network from CDIAC"s
ftp area.

2. In addition downloading data for the entire network, you may also query, plot, and download data for individual stations using our graphical user interface. CDIAC developed this interface using SAS Internet TM. (Note: Please review all documentation before using these data.)

Click on a state to retrieve monthly station data.

(Switch to USHCN Daily Data Page)

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