Question

Desert cooler cool better on hot and dry summer

Answer 1

A desert cooler cool better on hot and dry summer as on summer days the temperature is very high and humidity is less and due to which evaporation happens faster in the cooler and causes cooling to the outside environment.

Answer 2

this is because in summers the amount of water vapours in air is less ,so the rate of evaporation is high and the water gets evporated faster during summer providing with cool air