Climate Insights for Libertador General San Martín

The climate in Libertador General San Martín is warm and mild. The average annual temperature is 20°C and approximately 1454mm of precipitation falls per year. January is the wettest month, receiving around 231mm of rainfall. Libertador General San Martín 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: January, December, November. The coldest months are July, June, August, when temperatures can drop to 6°C.

Temperatures in Libertador General San Martín vary considerably across the year, with a 24°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 30°C and the mean temperature sits around 25°C. July is the coolest month, with minimum temperatures around 6°C and an average of 12°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

Libertador General San Martín is a fairly wet location, receiving approximately 1454mm of precipitation annually, which averages out to around 121mm per month. The wettest month is January, averaging 231mm of rainfall. March and February also tend to see above-average precipitation. The driest month is September, with just 21mm. That's 210mm less than January, 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.

Libertador General San Martín 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 October, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently autumn in Libertador General San Martín, which began on March 20, 2026. Libertador General San Martín 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 January at around 30°C, while the coldest stretch bottoms out in July near 6°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Libertador General San Martín is during May, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 54mm per month. By contrast, January can be uncomfortably hot with highs reaching 30°C, while July is the coldest period with lows dropping to 6°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Libertador General San Martín 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. 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.