Climate highland regions are areas of land that are generally cooler and moister than surrounding lowland areas. The characteristics of highland climate regions vary considerably, as these areas are influenced by unique regional topographical and geological conditions, as well as different local weather patterns. However, they have lower annual temperatures (for both night and day) and more precipitation than surrounding areas of lower altitude.
The difference between climates at high altitudes in comparison to lower altitudes occurs for several reasons. As altitude increases, temperatures and pressure falls. Levels of dust and overhead air also decrease, which allows for greater atmospheric transparency. Precipitation also increases with altitude, and orientation of mountain slopes may influence climate as well.