The Coastal Plains experience a tropical and temperate climate, characterized by hot, humid summers and mild winters.

This climate is influenced by the proximity to large bodies of water like the Atlantic Ocean and the Gulf of Mexico, which moderate temperatures and contribute to the region's overall humidity. In the southern parts of the Coastal Plains, particularly near the Gulf of Mexico, the climate leans more toward tropical, with year-round warmth and occasional heavy rainfall. Meanwhile, the northern sections experience a more temperate climate with cooler winters. The favorable weather conditions support a variety of agricultural activities, including the cultivation of crops like cotton, soybeans, and citrus fruits. Additionally, the warm climate fosters rich ecosystems, including wetlands and forests, making the Coastal Plains ecologically diverse and economically significant.