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.
Average Monthly Temperature in Tundra. Tundraâs average annual temperature is -28 degrees Celsius making it very difficult for organisms to survive. During the winter, temperatures averages at -34 degrees Celsius where nights can last for weeks and daylight can barely last a few hours. During summer, the temperature is an average of 3-12 degrees Celsius with sun shining nearly 24 hours a day in the Arctic Tundra.