Chile’s weather varies dramatically depending on where you are in the country, because Chile stretches over 2,600 miles from north to south. The far north is one of the driest places on Earth, the central valley enjoys warm, dry summers and mild, rainy winters, and the deep south is cold, wet, and windswept for much of the year. Because Chile is in the Southern Hemisphere, its seasons are flipped: summer runs from December to February, and winter from June to August.
Northern Chile: Desert Heat, Zero Humidity
The far north, home to the Atacama Desert, is defined by extreme dryness. Some weather stations in the Atacama have never recorded measurable rainfall. In San Pedro de Atacama, humidity stays at virtually 0% all year, and the skies are almost always clear.
Temperatures are warm but not extreme, thanks to the region’s high elevation. Summer highs (December through February) reach about 80°F, while winter highs (June through August) drop to around 68°F. The real swing happens between day and night: summer lows fall to the upper 40s, and winter nights dip to the mid-30s. If you’re visiting the desert, pack layers regardless of the month.
South of the Atacama, the “Near North” is semi-arid rather than true desert. Rainfall is still scarce, but enough moisture supports scrubby vegetation and some agriculture, particularly in river valleys running down from the Andes.
Central Chile: Mediterranean Summers and Rainy Winters
Central Chile, including Santiago and the wine country, has a Mediterranean climate with a sharp wet-dry divide. Summers are warm and virtually rain-free. January highs in Santiago average around 28°C (82°F) with only about 11 mm of rain for the entire month. Winters are cool and damp: June highs drop to 15°C (59°F), and that single month delivers roughly 123 mm of precipitation, nearly a fifth of Santiago’s annual total of 635 mm.
Spring (September through November) and fall (March through May) are transitional and often considered the most pleasant months. Temperatures are moderate, crowds are thinner, and the landscape greens up in spring after the winter rains. El Niño cycles can intensify summer heat in this region and worsen drought conditions, which in recent years has contributed to increased wildfire risk during January and February.
The Humboldt Current and Coastal Fog
Chile’s entire coastline is shaped by the Humboldt Current, a massive flow of cold water moving northward from Antarctica. This current keeps coastal air temperatures 1 to 2°C cooler than areas just inland or farther offshore. Along the northern coast, the cold water creates a persistent fog layer called the “camanchaca” that rolls in most mornings, even in places that almost never see actual rain. If you’re planning beach time, expect coastal cities to feel noticeably cooler than inland valleys at the same latitude.
The Lake District: Rain Most of the Year
South of the central valley, Chile’s Lake District (around Puerto Montt and the volcanoes) is one of the wettest inhabited parts of the country. Puerto Montt receives about 1,700 mm (67 inches) of rain per year, spread across an average of 222 rainy days. That means it rains on roughly 6 out of every 10 days.
The driest stretch is January and February, when rainfall drops to around 90 mm per month and you get rain on about 12 to 13 days. Even in “dry” summer, waterproof layers are essential. Winter months are the wettest: June and July each bring over 220 mm of rain, with precipitation on 23 to 24 days of the month. Temperatures stay cool year-round, with mild summers and chilly but rarely freezing winters at lower elevations.
Patagonia: Wind, Cold, and Stark Seasons
Chilean Patagonia is defined as much by wind as by temperature. The windiest months run from November through early March, peaking in January at average speeds of 6.5 mph, though gusts at exposed sites like Torres del Paine can be far stronger. Summer highs reach the mid-80s°F in sheltered valleys, but wind chill and rapid weather changes mean conditions feel much harsher than the numbers suggest.
Winter lows hover around 39°F, and June is the wettest month with about 2.7 inches of rain spread across roughly 6 rainy days. Summer months (December through February) are the driest, averaging only about 0.2 inches of rain each. The long summer daylight, sometimes 17 hours or more, makes December through February the prime trekking season despite the wind.
The Andes: Snow and Ski Season
The high Andes along Chile’s eastern border create their own weather. Major ski resorts near Santiago, like Portillo at 9,450 feet, receive snow between June and September. Daytime highs at ski elevations typically range from minus 5°C to 5°C (23°F to 41°F). Storms tend to arrive in short, intense bursts that can dump several feet of snow overnight, followed by clear, sunny skies. Snow depth varies widely from year to year, and the season can be unpredictable.
Even in summer, the highest peaks stay snow-capped. Hikers and climbers heading above 3,000 meters at any time of year should prepare for freezing temperatures, strong UV radiation, and fast-changing conditions.
Easter Island: Subtropical and Mild
Easter Island (Rapa Nui), located 3,700 km off the coast in the Pacific, has a completely different climate from the mainland. Its oceanic setting keeps temperatures remarkably stable, with a mean annual temperature of about 20.6°C. The warmest month, February, averages around 24°C, while the coolest months of July and August sit near 18°C. That’s only a 6-degree seasonal swing.
Rainfall is evenly distributed throughout the year, totaling roughly 1,100 mm annually. There’s no true dry season, but showers tend to be brief. The island feels tropical compared to mainland Chile at the same latitude, and you can visit comfortably in any month.
Best Times to Visit Each Region
- Atacama Desert: Year-round, though March through May and September through November offer the most comfortable temperatures without peak-season crowds.
- Santiago and wine country: October through April for warm, dry weather. December and January are hottest.
- Lake District: January and February for the least rain, though you should still expect wet days.
- Patagonia: December through February for the longest days and driest conditions. Wind is unavoidable.
- Ski resorts: July and August for the most reliable snow.
- Easter Island: Any month works. January through March is warmest.