Ratee of evaporation depends on 
1.surface area: when there is more area there is more evaporation due to more space for mol to escape
2.humidity:when humidity is more then there wont b more space for new mol for wet objects to enter into the surrounding
3.temperature: more temp. leads to more evaporation as it gives more energy for the mol to escape into atmosphere.
4.wind speed: due to more wind speed mol of water could b taken away from the vicinity of the wet object and gives space of r the new mol 2 enter