In the United States, the four seasons are typically defined by the , which groups months based on annual temperature cycles rather than the specific dates of solstices and equinoxes. Winter: December, January, February
Spring is the great transition. The frozen north thaws, the south explodes with pollen, and tornado season begins in the Great Plains. seasons by month usa
Because the Earth takes time to heat up and cool down. Meteorologists split the seasons by month (Mar-May = Spring) because it better matches the actual temperatures and makes comparing climate data easier. In the United States, the four seasons are