Climate Insights for Buenos Aires

The climate in Buenos Aires is warm and mild. The average annual temperature is 25°C and approximately 2332mm of precipitation falls per year. Buenos Aires receives a notable amount of rainfall throughout the year, including during its driest month. Buenos Aires is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, June, April. The coldest months are January, February, December, when temperatures can drop to 19°C.

Buenos Aires sees moderate temperature variation throughout the year, ranging from 19°C to 30°C. The warmest month is May, when average highs reach 30°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 19°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between March and April, with a 2°C shift in average temperatures.

Buenos Aires is a very wet location, receiving approximately 2332mm of precipitation annually, which averages out to around 194mm per month. The wettest month is October, averaging 378mm of rainfall. September and November also tend to see above-average precipitation. The driest month is April, with just 48mm. That's 330mm 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 mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, 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 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 17km/h in winter, 16km/h in spring, 13km/h in summer, 15km/h in autumn.

It is currently spring in Buenos Aires, which began on March 20, 2026. Buenos Aires is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 30°C, while the coldest stretch bottoms out in January near 19°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Buenos Aires is during March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 79mm per month. By contrast, May can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to 19°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

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.