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Portillo, Chile · Alpine mountain climate

Portillo in September: go or not?

Tough period. Portillo in September only reaches 4.1/10.

📅 Data updated: October 2026 🛰️ ERA5 · 10 years 📍 32.84°S · 70.13°W
⚡ This month's verdict
Avoid
Portillo · September
4.1
-3–3°
Temperature
18%
Rain
7h
Sun
❄️ Alpine climate☀️ High-altitude UV🌦️ Changeable weather
Photo : Pedro Gandra via Unsplash
The month in detail

What to expect in September

Off-season for skiing Portillo — lifts are closed. Consider hiking, mountain biking or summer activities at altitude. Rain risk remains low (18% of days), leaving good room for outdoor activities.

September ranks 7 out of 12 months in Portillo. Compared to August: +0.9h of sun per day.

This month's conditions

What it's like in September

UV index
7 · high
sunscreen and hat advised
Feels like
dry air
-13°
Daylight
11.8h of daylight
Air quality
fair
AQI 43
Compare

Is September the right month?

The best month in Portillo is January (7.4/10), 3.3 pts higher than September.

See January →See all 12 months →
Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🎟️ Activities & tours · Portillo

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a mountain stay.

Country · Chile

🗣️LanguageSpanish
💶CurrencyChilean Peso ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5

🌡️ Climate

🌍Climate typeAlpine mountain climate
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 16°C
❄️Coolest monthJune · 1°C
🌧️Rainiest month ⓘJune · 24%

🏔️ Mountain stay

⛰️Village altitude2880 m
🎿Ski area2880 → 3322 m
⛷️Ski seasonDec → May
🥾Hiking seasonJun → Sep
🧗High mountains ⓘGuide recommended
Location

Where is Portillo ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Chile
Alpine mountain climate climate with a 7.4 → 1.2 gap between best and worst month. 10 years of ERA5 data to choose by project.
32.84°S · 70.13°W
Questions

Frequently asked questions

When is the best time to visit Portillo?
It depends on the activity. For skiing: June (ski score 8.0/10). For hiking/summer: February (8.5/10, 16.0°C).
Can you ski in Portillo in winter?
Yes, it's peak ski season. Average ski score December–February: 0.9/10. Cold temperatures (16°C max in January) and frequent snowfall.
Is it warm in Portillo in summer?
In February, temperatures average 16.0°C. Best period for hiking and outdoor activities.
What is the wettest month in Portillo?
May is the wettest month with May has the lowest climate score of the year.
Do you need sun protection in Portillo in September?
The average UV index reaches 7 in September in Portillo (high), with about 11.8h of daylight. Sunscreen and hat advised.