Climatology What is climatology? How does it differ from weather? Describe the Koppen Climate Classification and its purpose. Climatology is one of the several branches of physical geography, but it differs from weather in several ways. The term climate implies an average, or long term record of weather conditions at a certain region. It conveys a generalization of all the recorded weather observations in a given area. Weather conditions are recorded in specifics for any given moment in time: the temperature, percentage of rainfall, and percentage of humidity. Climate on the other hand, is described in more general terms. Humid Equatorial climates, Dry clim