Hourly The hourly analysis of surface air temperature (SAT) is a product over global land, constructed from native model grids to our target analysis resolutions through calibration against GTS-based analyses of daily Tmax and Tmin. CFSR (1/6° by 1/6°) This product is updated every month with one month latency. The data files can be downloaded from our ftp site http://ftp.cpc.ncep.noaa.gov/precip/SAT/CFSR. GFS real-time forecast (0.05° by 0.05°) Daily Tmax / Tmin