NOTICE (September 2017): Data previously stored at the CDIAC archive are being transitioned to the new, ESS-DIVE archive. This website provides access to the CDIAC data during the transition. If you have any questions regarding the new archive or the data transition, please contact ess-dive-support@lbl.gov.

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United States Historical Climatology Network

NOTE: This interface is no longer supported. Please refer to the GHCN pages for the current interface