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SUMMIT ENGINEERING C 0 1 ENGINEERS & LAND SURVEYORS <br /> Mail: P.O. Box 1897 Alamosa, CO 81101 P: 719-589-6147 E: summitengco@gmail.com <br /> Climate Information <br /> The San Luis Valley is situated in South-Central Colorado. It is defined by the Sangre <br /> de Cristo Mountain Range to the east and the San Juan and La Garita Mountain <br /> Ranges to the west. This area covers approximately 7500 square miles and sits at an <br /> average elevation of 7500 feet. Although the valley itself is arid, the surrounding <br /> mountains provide snowmelt to support extensive farming in the valley. <br /> As a result of the surrounding mountain range barriers, the valley is an extremely arid <br /> climate with most areas receiving between seven and nine inches of <br /> precipitation annually. The town of Antonito averages 8.35 inches of precipitation <br /> annually. The majority of precipitation falls during the summer months, particularly in <br /> July and August when the North American Monsoon is active and feeding moisture into <br /> the area from the southwest. During these months, scattered afternoon thunderstorms <br /> can produce locally heavy rain and occasional hail. <br /> COLORADO <br /> PRISM 1971 -2000 Mean Annual Precipitation <br /> + .x V-1 Ti <br /> r <br /> .f <br /> f f <br /> 2WO <br /> Ai <br /> r " <br /> s <br /> i <br /> Temperatures <br /> Job # 1200710MP - A Page 35of78 <br />