IN THE MIDWESTERN United States, Missouri is the 19th state in terms of size of all the states. Its name is derived from a Native American word for “town of large canoes.” Missouri covers an area of 69,686 square mile (180,487 square kilometer). A landlocked STATE, inland waters cover an area of 691 square mile (1,790 square kilometer). The largest of these waters is Lake of the Ozarks in central Missouri. The state’s north-south extent is 308 mile (496 kilometer) and the east-west extent is 284 mile (457 kilometer). With the Mississippi River running along its eastern border, Missouri is bounded by 8 states: Iowa, Illinois, Arkansas, Kansas, Kentucky, Tennessee, Oklahoma, and Nebraska. Missouri, thanks in part to a lack of major physical features, has a continental climate with hot and humid summers coupled with cold winters. The average July temperature is 78 degrees F (26 degrees C), and the average January temperature is 31 degrees F (-1 degrees C). Missouri sees an average of 40 inch (102 centimeter) of precipitation a year, the bulk of it falling in the south. The lack of features also creates space for contrasting air masses to meet, causing summer storms or tornadoes.