When to Visit Chile
The diverse climate of Chile ranges from the world's driest desert in the north - the Atacama Desert - through a Mediterranean climate in the middle, humid subtropical on Easter Island, to an oceanic climate, including alpine tundra and glaciers in the east and south. At least seven major climatic subtypes can be found throughout the length of Chile.
Most of the country experiences four seasons: Summer (December to February), Fall (March to May), Winter (June to August), and Spring (September to November).
Santiago is a vibrant metropolitan city which is nice to visit year-round. Rainy season is June through August, so some prefer to visit September to May. The warmest time of year in Santiago is in January when it is 70°F on average and the coldest time of year in Santiago is in July when it is 49°F on average, but could get down to 32°F.
Santiago – Wine Country
The most popular time to visit wine country is October to April. The vines are green and growing between October and February and harvest season is March to May, with harvest festivals take place primarily in March.
A visit to the wineries during the Chilean Winter or Spring is also enjoyable and a great side trip from Santiago or addition to any day on the slopes.
San Pedro de Atacama Desert
Its location almost exactly on the Tropic of Capricorn (which means no drastic changes in the length of daylight hours) and a stable climate make any time of the year a good time to visit here. If you dislike the cold, June through September can be uncomfortable when temperatures plummet at night.
If you want to avoid the crowds, steer clear of high season, from December through February and mid-July.
The increase in the number of flights and the warmer weather makes the summer months of December through March a popular time to visit Easter Island. The temperatures during these months averages around 85°F and for tourists from the northern hemisphere, the heat on the island usually comes as a nice break from the winter cold they are probably experiencing at home. The most important cultural festival in Easter Island, and it is celebrated every year during the first two weeks of February
The winter months of July to August, on Easter Island are not overly cold, but they can be cool. The average low temperature can reach the high -50°F, but there is usually a wind at this time of year that makes the temperature feel cooler than it really is. The wind rarely stops blowing at this time of year, therefore jackets that are wind-proof, sweaters and a hat that can be strapped to the head are necessary.
April to June and October to December, between the summer and winter seasons is not a bad time to visit either as the climate is fairly temperate.
The lake district is arguably the most beautiful area of the country where volcanoes meet lakes. Most head here during southern Chile's glorious summer, between December and March. This is also the period that communities across the region hold their own festivals.
For fishermen, the official season commences the second Friday of November and runs through the first Sunday of May.
For snow sport enthusiasts, the winter months of June to September are ideal.
Patagonia (Aysen Region and Torres del Paine)
Mid-November to Mid-April is a good time frame to visit. In general, the weather is extremely variable in Patagonia and it is not uncommon to have clear blue skies, rain, snow, wind and more blue skies all in the same day. In early to mid-October ñandues (similar to an ostrich) and guanacos (relative to the llama) may be accompanied by their young. In mid to late April fall foliage is at peak.