The Great Plains cover a wide area of the North American continent. In general, the Plains closer to the Rocky Mountains are dryer because they are in the rain shadow of the mountains; these are the short grass prairies. Farther east, where it is more humid and there is more rain, there are tall grass prairies.
In general, the Great Plains have a wide variety of weather throughout the year with very cold winters and very hot summers. There is usually plenty of wind, too. The prairies support abundant wildlife in undisturbed settings, but people have easily converted much of the prairies for agricultural purposes or pastures.
The Great Plains is a dry area with lots of open spaces. It is usually hot in the Plains with hot wind blowing.
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what factors affect the climate of the great climate region
Whatever the climate of the Great Plains is.
Semiarid climate
The Great Plains have two separate types of climate. The southern area has a humid subtropical climate, while the northern and central areas have a humid continental climate.
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The central plains are mostly flat with numerous streams and rivers, however the great plains are much flatter and the climate is much drier.
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Tornadoes are more common on the Great Plains, though this has more to do with climate than with topography.
Much of the nation's wheat is grown on the Great Plains. The geographic position of the Great Plains plays a huge role in influencing the climate that is favorable for growing wheat.
because they grow well in that climate
One can find good information about the Great Plains in the Wikipedia article about the topic. It has information on location, boundaries, geology, climate, history and current uses of the Great Plains.