Long-Term Daily and Monthly Climate Records from Stations Across the Contiguous United States
United States Historical Climatology Network
The United States Historical Climatology Network (USHCN) is a high quality data set of daily and monthly records of basic meteorological variables from 1218 observing stations across the 48 contiguous United States.
M.J. Menne, C.N. Williams, Jr., and R.S. Vose
National Climatic Data Center, National Oceanic and Atmospheric Administration