Climate of Argentina

The climate of Argentina is a complex subject: the vast size of the country and considerable variation in altitude make for a wide range of climate types. Argentina has four seasons: winter (June–August), spring (September–November), summer (December–February) and autumn (March–May), all featuring different weather conditions. Summers are the warmest and wettest season in most of the country except in most of Patagonia where it is the driest season. Winters are normally mild in the north, cool in the center and cold in the southern parts with the latter experiencing frequent frost and snow. Because southern parts of the country are moderated by the surrounding oceans, the cold is less intense and prolonged than areas at comparable latitudes in the northern hemisphere. Spring and autumn are transition seasons that generally feature mild weather.

Many regions have different, often contrasting, microclimates. In general, northern parts of the country are characterized by hot, humid, rainy summers and mild winters with periodic droughts. Mesopotamia, in the northeast is characterized by high temperatures and abundant precipitation throughout the year with droughts being uncommon. West of this lies the Chaco region, which is the warmest region in Argentina. Precipitation in the Chaco region decreases westwards, resulting in the vegetation changing from forests in the east to shrubs in the west. Northwest Argentina is predominantly dry and hot although the rugged topography makes it climatically diverse, ranging from the cold, dry Puna to thick jungles. The center of the country, which includes the Pampas to the east and the drier Cuyo region to the west has hot summers with occasional tornadoes and thunderstorms, and cool, dry winters. Patagonia, in the southern parts of the country has a dry climate with warm summers and cold winters characterized by strong winds throughout the year and one of the strongest precipitation gradients in the world. High elevations at all latitudes experience cooler conditions, and the mountainous zones can see heavy snowfall.

...
Wikipedia