Dinsmore is an unincorporated community in, California. It is located on the Van Duzen River, at an elevation of 2415ft. Dinsmore Airport and the Dinsmore Store are located nearby. Also nearby is the Mad River, Ruth, California and Ruth Reservoir (located in Trinity County).ClimateThis region experiences warm and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Dinsmore has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.