Water kept in an earthen pitcher remain cold in summer days - explain?

Water kept in an earthen pitcher remains cold on summer days - explain?

Water kept in an earthen pitcher remains cold on summer days. An uncountable number of pores are there on the body of an earthen pitcher. Through these pores, water seeps out and evaporates. The needed amount of latent heat is provided by the water of the pitcher and as such the water becomes cold.

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