Oceanic climate

An oceanic climate, also known as a marine climate or maritime climate, is the temperate climate sub-type in Köppen classification represented as Cfb or represented as Do under the Trewartha climate classification, typical of west coasts in higher middle latitudes of continents, generally featuring warm summers and cool to mild winters (for their latitude), with a relatively narrow annual temperature range and few extremes of temperature under Köppen's system or mediocre growing seasons with mild winters under Trewartha's. Oceanic climates can be found in both hemispheres generally between 40 and 60 degrees latitude, with subpolar versions extending to 70 degrees latitude in some coastal areas and some hot-summer oceanic climates extending to just north of 35 degrees North latitude in North America and Honshu and just south of 35 degrees North latitude in Mainland China under the Trewartha classification. Other varieties of climates usually classified together with these under the Köppen system include subtropical highland climates, represented as Cwb or Cfb, and subpolar oceanic or cold subtropical highland climates, represented as Cfc or Cwc. Subtropical highland climates occur in some mountainous parts of the subtropics or tropics, some of which have monsoon influence, while their cold variants and subpolar oceanic climates occur near polar or tundra regions.