The lowest monthly average temperature in Santee for December is 56 degrees. The most monthly precipitation in Santee occurs in January with 0 inches. The air quality index in Santee is 22% worse than the national average. The pollution index in Santee is 96% better than the national average.
According to the US Census Bureau's population clock, the estimated 2015 United States population (July 2015) is over 321.3 million. This differs a bit from the 325.1 million estimated by the United Nations.
By 1900, the U.S.A. population jumped to 75,994,575. In 1920 the census counted more than a hundred million people (105,710,620). Another 100 million people were added to the United States population in just fifty years when the two hundred million barrier was reached in 1970 with 203,302,031 counted in the census. The 2000 Census counted a U.S.A. population of 281,421,906. Six years later the U.S. population had grown to 300 million.