Weather of Chile:
As Chile is such a stretched country and the land rises from sea level to over 6500 meters in just about 100 kilometer, the country has different climates.
The north has a typical desert climate and the Atacama desert is actually the driest desert in the world. Arica has practically no rain at all and other places more inland haven't seen rain in years. Despite this, the Atacama desert is not particularly hot, mainly because of the average hight of about 2300 meters. Temperatures occasionally hit 35 or a bit more, but that's it. Arica is named the city of eternal spring, with temperatures always very welcome between 15 and 25 degrees Celcius. On the high altiplano in the Andes, it can get very cold, particularly at night when temperatures normally drop below zero.
The centre has a more temperate climate with hot summers and mild winters. Santiago can get pretty hot in summer and together with the smog it is not a place you fancy being in summer.
Further south, summers are cooler and winters a bit colder. This part around the lakes and volcanoes of Chile sees more rain than other parts of the country.
In the bottom south (Patagonia) summers are short en cool, sometimes even cold, and snow can fall almost every month of the year. In Punta Arenas, temperatures of 20 degrees or more aren't recorded that much.