Climate Overview
The climate in Chaitén is cool. The average annual temperature is 7°C and approximately 4253mm of precipitation falls per year. Chaitén receives a notable amount of rainfall throughout the year, including during its driest month. Chaitén is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, January, December. The coldest months are July, June, August, when temperatures can drop to 0°C. Chaitén experiences heavy snowfall, typically from January through December.
Temperature
Chaitén sees moderate temperature variation throughout the year, ranging from 0°C to 17°C. February is the warmest month, though highs remain moderate at 17°C with a mean of 13°C. July is the coolest month, with minimum temperatures around 0°C and an average of 2°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.
Precipitation
Chaitén is a very wet location, receiving approximately 4253mm of precipitation annually, which averages out to around 354mm per month. The wettest month is June, averaging 531mm of rainfall. August and July also tend to see above-average precipitation. The driest month is February, with just 159mm. That's 372mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Chaitén receives heavy snowfall, accumulating around 498cm annually from January through December. The snowiest month is August, with approximately 121cm. Winter travel should account for significant snow cover.
Wind
Chaitén is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in Chaitén, which began on March 20, 2026. Chaitén is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 17°C, while the coldest stretch bottoms out in July near 0°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 1 to 13°C. Rainfall is heavy, totalling around 1017mm across the season with a monthly average of 339mm. Winds are generally light, averaging 10km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 7 to 17°C. Rainfall is heavy, totalling around 625mm across the season with a monthly average of 208mm. Winds are generally light, averaging 10km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 3 to 15°C. Rainfall is heavy, totalling around 1109mm across the season with a monthly average of 370mm. Expect around 43cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 0 to 6°C. Rainfall is heavy, totalling around 1502mm across the season with a monthly average of 501mm. Expect around 309cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Chaitén based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
