The Global Historical Climatology Network (GHCN) is an integrated database of climate summaries from land surface stations across the globe that have been subjected to a common suite of quality assurance reviews. The data are obtained from more than 20 sources. Some data are more than 175 years old while others are less than an hour old.
Data File Access
For users who know the exact data they need and are comfortable using FTP.
Data Access via Climate Data Online (CDO)
For users who are not certain of the exact data they need or are not comfortable using FTP.
Temperature dataset that contains monthly mean temperatures and is used for operational climate monitoring activities.