<P> Sedona is located at 34 ° 51 ′ 36" N 111 ° 47 ′ 21" W ﻿ / ﻿ 34.859897 ° N 111.789199 ° W ﻿ / 34.859897; - 111.789199, which is in the Upper Sonoran Desert of northern Arizona . At an elevation of 4,500 feet (1,372 m), Sedona has mild winters and hot summers . </P> <P> According to the United States Census Bureau, the city has a total area of 19.2 square miles (49.7 km), of which 0.04 square miles (0.1 km), or 0.22%, is water . </P> <P> The famous red rocks of Sedona are formed by a layer of rock known as the Schnebly Hill Formation . The Schnebly Hill Formation is a thick layer of red to orange - colored sandstone found only in the Sedona vicinity . The sandstone, a member of the Supai Group, was deposited during the Permian Period . </P> <P> Sedona has a temperate semi-arid climate . In January, the average high temperature is 57 ° F (14 ° C) with a low of 31 ° F (− 1 ° C). In July, the average high temperature is 97 ° F (34 ° C) with a low of 64 ° F (17 ° C). Annual precipitation is just over 19 inches (480 mm). </P>

How did the red rocks form in sedona
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