Abstract: The object of the invention relates to a method for the evaporative cooling of zones (12) of a building (100) that has an external surface (14) divided into several zones (12) and an internal space (16) and of the microclimate in the vicinity of the zones (12), the essence of which is measuring the percentage of moisture on the external measuring surface (28a) using a moisture measuring sensor (28) provided with an external measuring surface (28a) and determining the percentage of drying rate value, —providing a central unit (30) in operation connection with the valves (22), and in data connection with the moisture measuring sensors (28), and several control programs stored in it, which control programs store various first percentage of moisture values, —receiving and processing the percentage of drying rate data and percentage of moisture data measured by the moisture measuring sensor (28) using the central unit (30), —selecting a control program from among the several stored control programs using the dryin