Geography. According to the United States Census Bureau, the CDP has a total area of 81.9 square miles (212 km 2), of which, 81.8 square miles (212 km 2) of it is land and 0.14 square miles (0.36 km 2) of it (0.19%) is water.Durham’s main agricultural products are almonds and walnuts. Climate. According to the Köppen Climate Classification system, Durham has a warm-summer Mediterranean …

