Brazil's climate has little seasonal variation since most of the country is located within the tropics. However, although 90% of the country is located within the tropical zone, year-long climate varies considerably from the mostly tropical North (the equator traverses the mouth of the Amazon) to temperate zones below the Tropic of Capricorn (23°27' S latitude), which crosses the country at the latitude of the city of São Paulo. Brazil has five climatic regions: equatorial, tropical, semiarid, highland tropical, and subtropical.