Climate Insights for Buenos Aires

The climate in Buenos Aires is warm and mild. The average annual temperature is 19°C and approximately 2839mm of precipitation falls per year. Buenos Aires receives a notable amount of rainfall throughout the year, including during its driest month. Buenos Aires sits near the equator, so seasonal temperature differences are minimal throughout the year.

Buenos Aires has relatively stable temperatures year-round, staying within a 10°C range. May is the warmest month, though highs remain moderate at 25°C with a mean of 20°C. January is the coolest month, with minimum temperatures around 15°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.

Buenos Aires is a very wet location, receiving approximately 2839mm of precipitation annually, which averages out to around 237mm per month. The wettest month is October, averaging 511mm of rainfall. November and May also tend to see above-average precipitation. The driest month is February, with just 35mm. That's 476mm less than October, 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.

Buenos Aires is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 6km/h in winter, 4km/h in spring, 3km/h in summer, 3km/h in autumn.

It is currently autumn in Buenos Aires, which began on September 23, 2026. Buenos Aires sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in May at around 25°C, while the coldest stretch bottoms out in January near 15°C. Winter is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Buenos Aires is during January, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 55mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 25°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 Buenos Aires 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.