http://www.sightseer.tv/buenos-aires.php Clima Buenos Aires. This video is a quick overview of the yearly weather that Buenos Aires experiences. Watch this and know what to pack on your visit to the Capital of Argentina. Buenos Aires has a varied climate throughout the year, with each season bringing a different kind of weather to the capital. The Spring Season lasts from September to November. The days can be warm to hot with the nights being a bit more chilly. The Summer kick in when December starts. The weather in Buenos Aires during this time can get really hot with highs of 35C (95F). This lasts through to late February and early March. From Mid-march through into May, Autumn begins. Temperatures are still warm to very hot, but nights will become colder into late autumn. Finally winter in Buenos Aires takes hold from June to August. Temperatures average around 15C (59F) during the daytime, but early morning and at night bring a cold chill.