Quote from that page : “ This page provides time series and map visualizations of daily mean 2-meter air temperature from the NCEP Climate Forecast System (CFS

Quote from that page : “ This page provides time series and map visualizations of daily mean 2-meter air temperature from the NCEP Climate Forecast System (CFS) version 2 (April 2011 – present) and CFS Reanalysis (January 1979 – March 2011). CFS/CFSR is a numerical climate/weather modeling framework that ingests surface, radiosonde, and satellite observations to estimate the state of the atmosphere at hourly time resolution onward from 1 January 1979. The horizontal gridcell resolution is 0.5°x0.5° (~ 55km at 45°N). Temperature anomalies are in reference to 1979–2000 climatology for each specific day of the year.”