Title Improving Hybrid Models for Precipitation Forecasting by Combining Nonlinear Machine Learning Methods Type of Research Article Keywords Hybrid models · Precipitation · Forecast · Machine learning · Support vector regression Abstract Hybrid models · Precipitation · Forecast · Machine learning · Support vector regression Researchers Laleh Parviz (First Researcher)، Kabir Rasouli (Second Researcher)، Ali Torabi Haghighi (Third Researcher)