Question

why we find wetness on the outer surface of the pot ?

Answer 1

due to the water in the outer surface.

Answer 2

1. As a pot keeps water cool. thus wet droplets of water are found on the outer surface of the pot when the water molecules come in contact with the  cold pot
2. water can pass through soil as pots are made of clayey soil, water can pass through them. thus the outside of the pot is wet