Why does evaporation take place at all temperatures?

Evaporation: It is a surface phenomenon. Let's consider a bowl filled with water (at room temperature). Since, We've a temperature greater than absolute zero, the molecules of water will be randomly moving. read more

Evaporation takes place only on the surface of the body of water. The amount of evaporation depends on several factors - like, the temperature of both air and water, the humidity of the air, and the size of the surface exposed. read more

Any substance that can be a gas, tries to be a gas. Even if the average energy in a substance is below boiling there can be some portion above boiling point. read more

Temperature water (which I assume you are talking about) is an average. Some molecules are very cold and some are very hot while the average is moderate. Evaporation will still occur at all temperatures (within reason) though boiling (total phase change to a gas) will not occur until its boiling point. read more