Generation of Monthly Average Hourly Ambient Temperatures From Monthly Average Daily Temperature

A method to generate monthly average hourly ambient temperature values, T_ah,n, in terms of the monthly average daily ambient temperature, T_a and latitude, φ is presented here. The present correlations do not require the additional information needed in applying the correlations available in [1,2,3]. The predicted monthly average hourly ambient temperature, T_ah,n values have been found to be in agreement with data values within a % rms difference of 0.43 (when T_ah,n is in K) and the standard deviation has been found to be 1.243 K, for 56 primary locations of TMY2, comparable to the prediction of Erbs, Klein and Beckman [1].