What are the conditions necessary for the formation of sand dunes? Hi, Dunes are formed by interaction with the wind. Wind speeds of 10 to 20 mph,. are necessary for sand to start saltating under the direct pressure of the wind.
Winters are very harsh in Tundra climate. Winter months temperatures are usually between -18 and -50 degrees. Summer temperatures range from 35-50 degrees. High latitudes are the main cause of of the low temperatures. These areas mainly receive indirect sunlight.
Welcome to the Tundra's climate page. Here you can find information on the climate of the Tundra. The winter temperatures average about -30 F throughout most of the true Arctic including the North Pole. The coldest weather occurs in northeastern Siberia.