The study attempted to determine the correlates of academic performances of 535 students enrolled in the five programs of the College of Arts and Sciences in Southern Luzon State University, Lucban, Quezon, Philippines during the First and Second Semester of AY 2014-2015. A multivariate analysis of data was done to determine how internal and external factors which are further categorized into three clusters of variables: cognitive variables (IQ test scores [OLSAT] & College Admission Grade) and personality variables (personality test scores [NEO-PI] & General Self-efficacy scores) and environmental variables relate to academic performance in college (GWA). Data gathering was accomplished through administration of standardized and non-standardized tests and through coordination with the College Dean’s Office and the Guidance and Testing Office of the university, which provided other needed data. Analysis of findings identified four good predictors of academic performance of CAS students; two of which are cognitive variables consisting of OLSAT score and Admission Grade; one personality variable which is the level of Conscientiousness (based on NEO PI) and environmental factor, which is identified as family variables. The findings of the study add value to the predictive validity and reliability of the using standardized mental ability tests and previous academic performance reports in predicting academic success. It was further concluded that non-intellectual variables like personality traits and family has something to do with academic performance and intellectual achievement of students. An intervention program which focused on the four identified factors was designed to enhance the academic performance of CAS students.