Climate Overview
The climate in San Martín de los Andes is cool. The average annual temperature is 6°C and approximately 1173mm of precipitation falls per year. June is the wettest month, receiving around 225mm of rainfall. San Martín de los Andes 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, August, June, when temperatures can drop to -3°C. San Martín de los Andes experiences heavy snowfall, typically from March through December.
Temperature
Temperatures in San Martín de los Andes vary considerably across the year, with a 24°C difference between the coldest and warmest months. February is the warmest month, though highs remain moderate at 21°C with a mean of 13°C. The coldest month is July, when overnight lows fall to -3°C and the daily average is 0°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.
Precipitation
San Martín de los Andes is a moderately rainy area, receiving approximately 1173mm of precipitation annually, which averages out to around 98mm per month. The wettest month is June, averaging 225mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 29mm. That's 196mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. San Martín de los Andes receives heavy snowfall, accumulating around 466cm annually from March through December. The snowiest month is July, with approximately 110cm. Winter travel should account for significant snow cover.
Wind
San Martín de los Andes is mildly breezy, with an average annual wind speed of 14km/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 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 13km/h in winter, 15km/h in spring, 16km/h in summer, 13km/h in autumn.
Seasons
89 days until Winter
It is currently autumn in San Martín de los Andes, which began on March 20, 2026. San Martín de los Andes 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 21°C, while the coldest stretch bottoms out in July near -3°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from -2 to 15°C. Precipitation is moderate at around 242mm for the season, averaging 81mm per month. Winds are generally light, averaging 15km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 5 to 21°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are moderate at around 16km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 0 to 18°C. Precipitation is moderate at around 237mm for the season, averaging 79mm per month. Expect around 53cm of snow accumulation during this period. Winds are generally light, averaging 13km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -3 to 4°C. Rainfall is heavy, totalling around 597mm across the season with a monthly average of 199mm. Expect around 311cm of snow accumulation during this period. Winds are generally light, averaging 13km/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 San Martín de los Andes 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.
