Abstract: Implementations described and claimed herein provide systems and methods for evaporative cooling control. In one implementation, a humidity setpoint is received for a designated space, and at least one atmospheric condition of ambient air is received. The at least one atmospheric condition is measured using one or more ambient air sensors. A performance prediction of an evaporative cooler is generated by calculating a set of one or more predicted psychrometric properties of supply air leaving the evaporative cooler based on the at least one atmospheric condition. The humidity setpoint is compared to the set of one or more predicted psychrometric properties of the performance prediction in a setpoint comparison. A flow of fluid is controlled over evaporative media using one or more pumps of the evaporative cooler. The flow of the fluid is controlled based on the setpoint comparison such that the humidity setpoint is prevented from being exceeded.