Climate Overview
The climate in Buenos Aires is hot. The average annual temperature is 26°C and approximately 1169mm of precipitation falls per year. September is the wettest month, receiving around 315mm of rainfall. Buenos Aires is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, May. The coldest months are March, February, April, when temperatures can drop to 22°C.
Temperature
Buenos Aires has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 28°C. March is the coolest month, with minimum temperatures around 22°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Buenos Aires is a moderately rainy area, receiving approximately 1169mm of precipitation annually, which averages out to around 97mm per month. The wettest month is September, averaging 315mm of rainfall. August and October also tend to see above-average precipitation. The driest month is April, with just 1mm. That's 314mm less than September, 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.
Wind
Buenos Aires is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.
Seasons
88 days until Summer
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 July at around 31°C, while the coldest stretch bottoms out in March near 22°C. Summer is next, beginning on June 21, 2026 — 88 days from now.
Spring
Temperatures range from 22 to 30°C. Precipitation is minimal, with only around 20mm for the entire season. Winds are moderate at around 18km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 25 to 31°C. Rainfall is heavy, totalling around 534mm across the season with a monthly average of 178mm. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 30°C. Rainfall is heavy, totalling around 595mm across the season with a monthly average of 198mm. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 29°C. Precipitation is minimal, with only around 20mm for the entire season. Winds are moderate at around 16km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
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.
