What was the climate of the Great Plains like before sedentary farmers and pioneers arrived from the eastern part of the United States?

Semiarid with sparse vegetation and not many trees

Explanation:

The great plains is a region in the US as a great and a broad expanse of the flatlands and is covered by the prairies as the steppe grasslands and is located at the border of the united states and the Canada and it lies west of the Mississippi River and has a length of about 3,200 with area of about 1,300,000 km square and is divided into the northern and the southern and the middle parts. It has a climate of cool too harsh in winters and is hot and humid in summers and this region has very little trees that have mostly tallgrass species. and it receives than 20 inches of rainfall and has an arid type of climate and rangelands are generally formed as the large lands and the farmland.

Semi-arid type of climate with little rainfall and vegetation cover

Explanation:

The Great Plains refers to the large and flat extensive land areas covering the regions of the United States and Canada. It is comprised of the prairies, grasslands, and the steppes, having a distinct type of boundaries.

The climate now has changed a little after the invasion of the sedentary farmers and pioneers into these flatlands and is now suitable for carrying out agricultural activities at different places.

Before they came to these places, the climate was different. It was characterized by the occurrence of a semi-arid type of climate, where the moisture content in the air is comparatively less than the arid type. Due to this, there occurred a lesser amount of precipitation, not lesser than the deserts, and there was a lack of vegetation in these areas. There were fairly less number of trees in the initial period.