Most of the u.s. has a climate. tropical subtropical temperate polar

Temperate is the right answer.

In the southeast seashores of the U.S, the hot-temperate region stretches to the River Mississippi and across the Gulf Coast; the region is greatly influenced by the mild, humid tropic air mass that arises above the Gulf of Mexico. The extended frost-free period passes 200 days. Torrid air flows north in February and controls the zone till November when polar continental winds irregularly penetrate.