Geography, Climate, Map Setting Rainbow Bridge, the world's largest natural bridge, is considered a sacred place by the Navajo Indians, for whom personified rainbows have stood as guardians of the universe. This natural wonder nestles among canyons carved by streams en route to the Colorado River from Navajo Mountain's north flank. Until the formation of Lake Powell, this was one of the most remote and inaccessible regions in the contiguous United States. It is located on 160 acres of federal land in San Juan County, Utah, immediately adjacent to Navajo Mountain and the Navajo Reservation. Climate Summers are extremely hot with little, if any, shade.
Winters are moderately cold with night time lows often below freezing.
Spring weather is highly variable with extended periods of strong winds. Fall is generally mild. Although precipitation is generally less than 6 inches annually, both heavy rains and flash flooding can occur. Recommend lightweight, light colored clothing in summer, including a hat. Layers of clothing are best other times of year.