Title Statistical and multi-criteria methods for preprocessing meteorological data in reference evapotranspiration Type of Research Article Keywords Preprocessing; Reference evapotranspiration (ET0); Fuzzy normalization; Combinations. Abstract Preprocessing; Reference evapotranspiration (ET0); Fuzzy normalization; Combinations. Researchers Laleh Parviz (First Researcher)، Fardin Ghanbari-maleki (Second Researcher)