The Argentine climate tends to be temperate but due to the country’s vast size there are major regional differences. The Northern regions tend to have hot, humid summers with mild dry winters. The central regions have hot summers and regularly see powerful thunderstorms and tornadoes. (Western Argentina produces some of the world’s largest hail stones.) Winters tend to be cool. The Southern regions tend to have warm summers but bitterly cold winters complete with heavy snowfall.
The highest temperature, 49° C was recorded in the extreme north, and the lowest,–16° C , in the southern tip of the country. Rainfall diminishes from east to west. Rainfall at Buenos Aires averages 94 cm (37 in) annually, and the mean annual temperature is 16° C. Light snowfalls occur occasionally in Buenos Aires. Throughout Argentina, January is the warmest month and June and July are the coldest.
North of the Río Negro, the winter months (May–August) is the driest period of the year. The wide variations of climate are due to the great range in altitude and the vast extent of the country. In the torrid zone of the extreme north, for example, the Chaco area has a mean annual temperature of about 23° C and a rainfall of about 76 cm whereas Puna de Atacama has a temperature average of 14° C and a rainfall of about 5 cm. The pampas, despite their immensity, have an almost uniform climate, with much sunshine and adequate precipitation. The coldest winters occur not in Tierra del Fuego, which is warmed by ocean currents, but in Santa Cruz Province, where the July average is 0° C.
Winter- major winds including the Pampero blow onto the plains of Patagonia bringing in cold frigid weather. The south of the country receives heavy snowfall and extremely cold temperatures. The North is cool but rarely experiences snow except in the mountainous regions.
Spring- In the north, spring is a very short season but the further south you go the longer it lasts. Thunderstorms and hailstorms are frequent at this time of year and many of the country’s plant species burst into bloom.
Summer- In the north temperatures can reach as high as 27°C whilst in the south it will be on average only 9°C. This can however rocket up to a staggering 45°C due to the weather systems in action around the region.
Autumn- is a generally mild season which lasts longer in the south than it does in the north. The nights begin to draw in earlier during this season and due to the south’s proximity with the Antarctic those dark cold nights can draw surprisingly quickly.