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Generally, the mountains in due to the difference Altitude, Volume of relief, form and exposition are organization by variety microclimates: Differences in pressure, temperature, humidity, light, thermal energy, precipitation (and kind of it) and winds give a special form. Valley, Slope, Pick have the specific microclimates: Mountain is defined by bioclimate classification. Thermal inversion often exists in the valley regions and accompanies by fog, Katabatic and Anabatic exist in the mountain regions. While foehn (chinok) is a warm and dry wind and has an environmental impact, Mountain is and important obstacle against movement of air masses, the ascending Mountain air is very important, in this paper, a model of mountain precipitation studied. Damavand as the highest mountain in Iran is situated near East of Tehran and has originated on essential microclimates and environmental impacts.