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A hybrid cooling system encompassing; cooling tower, cooling coil and evaporative cooler have been discussed in ‎present study. Thereinafter, the hybrid system model is used to predict cooling potential of the system under various ‎operational conditions. In order to have an accurate performance prediction of the hybrid cooling system, a numerical ‎simulation was performed and the results validated using experimental measurements. The presented hybrid cooling ‎system provides the necessary pre-cooling effects, enabling a direct evaporative cooler that cools the air even below ‎outdoor air wet-bulb temperature. Besides, the potential of presented hybrid cooling system to provide thermal comfort ‎in various outdoor design conditions evaluated and compared with conventional direct evaporative cooler. Numerical ‎simulation revealed that the hybrid system complements direct evaporative cooling. Based on the simulation results, ‎the overall cooling effectiveness of hybrid system is tangibly magnified 10%-20% and also it is able to fulfill the ‎comfort condition in extended climate conditions rather than stand-alone direct evaporative coolers. Also in present ‎study water loss amount of hybrid system and direct evaporative cooler were verified in various climate conditions of ‎Iran.‎