You are here

ALERT: All of our websites and FTP areas (ncdc.noaa.gov, ncei.noaa.gov, climate.gov, drought.gov) will be unavailable from 4:00 PM on Tuesday, Dec 6 until approximately 1:00 AM on Wednesday, Dec 7 (EST). We apologize for this inconvenience.

U.S. Historical Climatology Network (USHCN)

The U.S. Historical Climatology Network (USHCN) data are used to quantify national- and regional-scale temperature changes in the contiguous United States (CONUS). The USHCN is a designated subset of the NOAA Cooperative Observer Program (COOP) Network with sites selected according to their spatial coverage, record length, data completeness, and historical stability.