A tropical climate is a climate typically found within the tropics, while a few locations outside the Tropics are considered to have a tropical climate. In the Köppen climate classification it is a non-arid climate in which all twelve months have mean temperatures of at least 18 °C (64 °F). Unlike the subtropics, where there are significant variations in day length and temperature to various degrees, with season, tropical temperature remains relatively constant throughout the year and seasonal variations are dominated by precipitation.