temperature can be 20 degrees F, the wind chill can knock it down considerably, making it feel as if it is much colder than it really is.
When you add a tree, shrubs or other structures outside of your home, the wind is stopped and can not hit the home, therefore reducing the wind chill factor for your home.
If you install what are called windbreaks (or any item that can stop the wind before it hits the home) you can reap benefits of up to 40% less fuel consumption in heating your home. If you live in a very windy area, you can lose even more, up to one third, of your winter fuel costs in this manner. (This is as compared to a home without these benefits.)
Summer
In the summer time, you will reap the rewards of cooler air. This happens due to evapotranspiration (the process of the tree moving and letting off water vapor) and shading from the tree. It can lower the temperature up to nine degrees in this way.
Another key point to make is that in a shaded area underneath a large tree, the temperature can be as much as 25 degrees F cooler than it is just above a layer of blacktop on your street.
All of this equals about 15% to up to 50% of lower need for air conditioning in the summer months. This can keep your costs down considerably. All of this just from a beautiful looking tree. 46