What are Climate Divisions?
Climate divisions represent regions within a state that are, as nearly as possible, climatically homogeneous. However some areas may experience rather extreme variations within a division (for example, the Rocky Mountain states). The divisions have been established to satisfy researchers in hydrology, agriculture, energy supply, etc., who require data averaged over an area of a state rather than for a point (station). Note that climate divisions are not the same as National Weather Service forecast zones.