I would say the prevailing winds in Ilinois are from a westerly direction.
It's prevailing Winds
South
North
To travel from Amsterdam to Rotterdam one has to go south.
all prevailing winds blow the same direction.
A wind that blows constantly from the same direction is known as a prevailing wind.
A wind that blows consistently from one direction is known as a prevailing wind. For example, over most of North America, the wind tends to blow from West to East, thus the prevailing Westerly.
Northeast
Prevailing winds tend to be light in summer and generally they flow out of the southwest. As winter settles in, prevailing winds begin to shift to northwest.
What are the prevailing wind direction in Piet Retief area South Africa
north