- Season Months
- June to September (Southern Hemisphere winter)
Good to know
Good to Know
- Due to proximity to the coast, weather in the Andes can change rapidly
- The climate exemplifies high-altitude Andean conditions, characterized by cold, dry weather influenced by the region's rain shadow effect, resulting in naturally low humidity
- Portillo normally receives an average of 20 feet of snow per season, however in the event of low snowfall, Portillo has extensive snowmaking for consistent operation
Overview
Annual precipitation totals 314mm (12.36 inches) across 44.7 rain days, with snow falling for 75.2 days and aggregating up to 2183mm (85.94 inches) of annual snowfall. The resort benefits from approximately 80% sunny days during the season.
Peak Months
- Best For Skiing
- July is the peak of winter, when Portillo generally receives frequent snow storms. August is known for the most predictable snow conditions with a solid snow base, receiving snowfall in heavy storm cycles followed by bluebird days with fresh snow and sunshine.
- Note On Crowds
- July sees many young children during South American holidays, which can be overwhelming for adult travelers. August and early September are ideal for North Americans for adult-oriented ambiance and better powder chances.
Season Months
June to September (Southern Hemisphere winter)
Off Peak Months
September brings spring conditions with warmer temperatures and spring skiing on softer snow, making it a great time for those looking for spring skiing with local culture experiences.
Rainfall Patterns
- Driest Month
- March is the driest month with 5mm (0.2 inches) of rainfall
- Wettest Month
- June is the wettest month with 80mm (3.15 inches) of precipitation across 3.3 days
Snowfall Patterns
- Secondary Peak
- The snowiest week is week 4 of June, with typically 2.6 snowy days and 36 cm of snowfall
- Peak Snowfall Month
- June has the most snowfall, when snow falls for 11.5 days and typically aggregates up to 621mm (24.45 inches)
- Least Snowfall Month
- January has the least snowfall, with snow falling for 1.3 days and typically aggregating up to 18mm (0.71 inches)
- Seasonal Note
- Winter in Portillo is characteristic for delivering short but intense snow storms that can leave behind several feet of snow overnight followed by bluebird sunny skies
Temperature Ranges
- Note On Temperature
- Temperatures generally do not dip lower than 25ºF (-3.9°C (25°F))
Coldest Month
- Month
- July (winter)
- Low Celsius
- -12.2°C (10°F)
- High Celsius
- -2.3°C (28°F)
- Low Fahrenheit
- -12.2°C (10°F)
- High Fahrenheit
- -2.3°C (28°F)
Warmest Month
- Month
- January (summer)
- Low Celsius
- 2.5°C (36.5°F)
- High Celsius
- 12°C (53.6°F)
- Low Fahrenheit
- 2.5°C (36.5°F)
- High Fahrenheit
- 12°C (53.6°F)
Snow Characteristics
Due to elevation and geographic location, Portillo receives very dry snow, and on a good powder day skiers experience serious blower powder conditions
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Portillo
Data last updated July 2026 · Verify anything important.