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  • Relative humidity (in percentage) and actual vapour pressure (in millibar) at 08:45 and 17:45 NST are computed from the readings taken from the non-aspirated simple Psychrometer (dry bulb and wet bulb thermometers at about 1.25 meter above ground level), sheltered in the Stevension screen. Missing number of days of for temperature, humidity and vapour pressure records, if exist, in any month is appended at the lower right corner of the corresponding data cell in the form of character code that is defined below the summary table.