Berlin has an oceanic climate (Köppen: ''Cfb''); the eastern part of the city has a slight continental influence (''Dfb''), especially in the 0 °C isotherm, one of the changes being the annual rainfall according to the air masses and the greater abundance during a period of the year. This type of climate features moderate summer temperatures but sometimes hot (for being semicontinental) and cold winters but not rigorous most of the time.