On October 21, 1947 there were fifteen states over 90F and thirty-eight states over 80F. Sixty percent of US stations were over 80F.
California 99 Oklahoma 98 Arizona 97 Texas 97 South Dakota 95 Kansas 94 Nebraska 92 New Mexico 92 Arkansas 91 Mississippi 91 Colorado 90 Iowa 90 Louisiana 90 Maryland 90 Virginia 90
Florida 89 Georgia 89 Illinois 89 Indiana 89 Minnesota 89 North Dakota 89 Pennsylvania 89 Tennessee 89 Wisconsin 89 Alabama 88 Kentucky 87 Missouri 87 North Carolina 87 Wyoming 87 Delaware 86 New Jersey 86 South Carolina 86 West Virginia 86 Michigan 85 Ohio 85 Utah 85 New York 84 Nevada 81 Idaho 80