Monthly mean values of 9 am dew-point temperature were studied using a total of 494 mainland Australian weather stations east of 141° longitude. The area was divided into four regions and multiple regression techniques were used to relate 9am mean dew-point to latitude, longitude, elevation and distance to sea. Many stations for which dew-point predictions might be required record rainfall. For areas where the use of rainfall as an independent variable improved the prediction, alternative relationships which included rainfall were also calculated.
T. H. Booth (Sun,) studied this question.