Why does a glass of water evaporate at only 25 degrees Celsius when the boiling point of water is 100 degrees Celsius?

Water can evaporate at any temperature, including 25 degrees Celsius, because evaporation is a surface phenomenon where molecules at the water's surface gain enough energy to break free from the liquid state. At lower temperatures, some molecules have enough kinetic energy to overcome the intermolecular forces holding them in the liquid. This process occurs gradually and continuously, which is why a glass of water can evaporate even well below its boiling point of 100 degrees Celsius.