Is the energy produced by the hydro-electric power affected by external factors like the altitude or the climate?

Energy produced by hydroelectric power is affected by external factors such as altitude and climate. The generation of hydroelectric power depends on water, with comes from rainfall. When there is lesser rainfall or snowmelt in that area, the amount of energy produced by hydroelectric power will be lesser. When the climate is very hot, there will be less water as the water has evaporated due to the heat. Thus, there will be less water available to produce hydroelectric energy, and so there will be less energy.

By damming up areas at high altitudes, the water at the area behind the dam will have more gravitational potential energy than that of water that is dammed up at a lower altitude. With more gravitational potential energy, more energy would be produced by the hydroelectric power.