When referencing this data set, or any of its output as calculated on our web site, please cite as indicated below:
Easterling, D.R., Karl, T.R., Mason, E.H., Hughes, P.Y., Bowman, D.P., Daniels, R.C. and Boden, T.A. (Eds.). 1996. United States Historical Climatology Network (U.S. HCN) Monthly Temperature and Precipitation Data. ORNL/CDIAC-87, NDP-019/R3. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee.