TMAX/TMIN Data Sets for the US -- Documentation Each file contains 365 (366 for leap year) direct access records. Record 1 is January 1 data, etc. Each record contains an array of data (141 x 71) that is oriented EASTward from 130W longitide and NORTHward from 20N latitude. Thus, the 1st point in each array (1,1) is valid for 130W, 20N. The grid spacing is 0.5 degrees of lat/lon. The data were generated on a Linux operating system and the binary is in "little endian" form. The data units are degrees Celsius. Contact information: michelle.lheureux@noaa.gov