Why does water have a high latent heat of vaporization?

Water possesses a high latent heat of vaporization primarily because of the hydrogen bonds that exist between its molecules.1

In a liquid state, these hydrogen bonds create a degree of cohesion between water molecules. To transition water from a liquid to a gaseous state, a significant amount of energy must be supplied to overcome these attractive forces and break the bonds. Because these intermolecular forces are relatively strong compared to those in many other substances, a large quantity of heat—approximately 540 calories per gram at 100 °C—is required to achieve vaporization.12

This property is fundamental to Earth's climate, as the evaporation of water and its subsequent condensation serve as a primary mechanism for transferring heat from the surface to the atmosphere.1