• THORNTHWAITE will calculate potential evapotranspiration by the Thornthwaite method (Ponce, V. M., 1989. Engineering Hydrology, Principles and Practices, Prentice Hall).

  • The program reports monthly and annual potential evapotranspiration (PET), given a set of mean monthly temperatures (January to December), and the geographical latitude [Example: 35o N].

  • The input data (mean monthly temperature) is in degree Celsius; the output data (PET) is in cm.

Click  -here- to view a sample data set.

RUN!

DISCLAIMER: The developer makes no warranties, expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this program for any one particular purpose. It is understood that the user proceeds at his/her own risk.