Mean Daily Temperature Pattern for Arid and Semi-arid Zones in Iran

Measuring of daily maximum and minimum tempratures is the oldest method to estimate mean daily temperature which has been a global standardized method since the ninteen century. Unfortunately this method is not precise. In this research we selected all climatology stations over the Khorasan province and drew a sample of temperature-graphs by a systematic sampling method to establish an accurated method. Mean daily estimates by integration of graphs and measuring daily maximum and minimum temperatures are calculated. Finally we introduce a new model for estimating mean daily temperatures by regression from daily maximum and minimum values.