Lake Havasu Lake Havasu Lake Havasu is a large reservoir behind Parker Dam on the Colorado River, on the border between California and Arizona. Lake Havasu City sits on the lake's eastern shore. The reservoir has an available capacity of . The concrete arch dam was built by the United States Bureau of Reclamation between 1934 and 1938. The lake's primary purpose is to store water for pumping into two aqueducts. Prior to the dam construction, the area was home to the Mohave Indians. The lake was named (in 1939) after the Mojave word for "blue". In the early 19th century, it
Lake Havasu City, Arizona °F (16 °C) to 70 °F (21 °C). Lows in winter average between 40 °F to 50 °F (4 °C-10 °C); temperatures do occasionally dip below 40 °F (4 °C). The city has extremely hot summers, with highs normally remaining between 100 °F and 115 °F (38 °C - 46 °C). Highs are known to exceed 120 °F (49 °C) during the summer months. Overnight low temperatures stay between 80 °F to 90 °F (27 °C - 32 °C) for the months of July and August. The highest overnight low temperature (record high minimum) ever recorded in Lake Havasu City