United States, Canada, and Adjacent Oceans (Examples)

The U.S. and CanadaCanada have a wide range of climatological environments. The southeastern U.S. is dominated by theBermuda Bermuda-Azores HighAzores High advecting moisture from the Gulf of MexicoHumidityand Africaand Gulf of Mexico, leaving the damp, sultry Humid Subtropical (Cfa) climate, which has no dry season and usually has a slight precipitation decrease in the autumn months. The U.S. Northeast and Continental Interior (generally corresponding to the Midwest) are influenced year-round by mid-latitude wave cyclone passages and tend to haveHumid Continental—cool summer (Dfd) climatein North America Humid Continental (Dfa, Dfb) climates, also with little precipitation seasonality. The Great PlainsGreat Plains and Prairies of CanadaCanada also experience humidity from the Gulf ofSemi-arid—hot (BSh) climatein Africain Mexico Mexico, but to a lesser extent; they are a transition zone where the C climates give way to Semi-arid (BSh, BSk) climates. The Interior West is largely BSh, BSk, or True Desert (BWh, BWk), as it sits in a double rain shadowDouble rain shadow of mountain ranges. The Pacific coast is influenced by the stabilityand stability associated with the cold CaliforniaCalifornia Current that is reinforced by the Hawaiian-Pacific Highand Hawaiian-Pacific High in summerTrue Desert—cold (BWk) climatein Pacific Oceanin the United States, to create a Mediterranean (Csa, Csb) climate, with Marine West Coast (Cfb) farther north. Canadian examples are also shown, which continue the patterns ofTrue Desert—hot (BWh) climatein Africain the United States the northernin United States United States.