Monthly weather forecast and climate
Buenos Aires, Argentina

The Congress Square monument in Buenos Aires, Argentina in spring
The Congress Square monument in Buenos Aires, Argentina in spring
The city of Buenos Aires has a humid subtropical climate classified under the Köppen climate classification as (CFA) - a warm temperate climate characterized by hot and humid summers that are occasionally accompanied by thunderstorms and cold, relatively dry winters.

December, January, and February are the hottest months with temperatures ranging between 18°C (64.4°F) and 20°C (68°F) at its coldest, and between 28°C (82.4°F) and 30°C (86°F) at its hottest, marking the summer season. Summer records the highest number of sunshine hours per day, totaling to an average of nine and also is the rainiest of all the seasons with the rain gauge collecting an average of 114.3mm (4.5").

Winter in Buenos Aires is cold and chilly, and its temperatures go as low as 7°C (44.6°F) on the coldest days and up to 15°C (59°F) on the warmest days. The sun stills come through, but generally, it remains crisp and relatively dry through winter falling between June and August. Rainfall in winter can collect up to 58.4mm (2.3").
Spring, in Buenos Aires, is the best time to visit the city - just in time for the blooming of the beautiful Jacaranda trees. This season is characterized by mild temperatures within the range of 15.6°C (60.1°F) and 26.7°C (80.1°F) and tolerable rainfall averaging 78.7mm (3.1") to 139.7mm (5.5").
This is the best time to indulge in outdoor activities and enjoy the breathtaking beauty of blooming flowers everywhere, which makes the city appear like a flower bed.

Winter might not be the best time to visit Buenos Aires owing to its low temperatures and wet atmosphere that could cause flu symptoms or worse. It is mostly only best to stay indoors and find activities to engage in as opposed to outdoors. The temperatures go to as low as 10°C (50°F) and make the worst time for people who love the warmth of spring and summer.

The temperatures are high in January and set a warm mood for the year. Ranging between 20°C (68°F) and 29°C (84.2°F) the temperatures make a perfect time for a swim. Weather in January »

The temperatures in Buenos Aires are friendly, ranging between 19°C (66.2°F) and 25°C (77°F), warm enough for any outdoor activities. Weather in February »

March is the transitional month between summer and autumn and is characterized by temperatures ranging between 18°C (64.4°F) and 26.8°C (80.2°F). Weather in March »

The temperatures in April in Buenos Aires are mildly warm and ranging between 15°C (59°F) and 22.3°C (72.1°F). Weather in April »

May is a lovely time in Buenos Aires, but the temperatures are taking a dip to read between 11°C (51.8°F) and 19°C (66.2°F). Weather in May »

It is getting a little gray by now, and clouds should be seen forming. The sun still shines but for only approximately 4 hours a day. Weather in June »

July has the lowest temperatures recorded in Buenos Aires, ranging between 7°C (44.6°F) and 15°C (59°F). It is characterized by chilly mornings and wet evenings. Weather in July »

August is a warm winter month in Buenos Aires as it sees its temperature take a small rise to read between 9°C (48.2°F) and 17°C (62.6°F). Weather in August »

Humidity in September drops further to 70% and as such the temperatures get warmer rising to read between 10°C (50°F) and 19°C (66.2°F). Weather in September »

With temperatures ranging between 13°C (55.4°F) and 23°C (73.4°F), October in Buenos Aires gets warmer now and more crowds start to flock the streets of Buenos Aires. Weather in October »

In Buenos Aires November nights are cold and the days warm with temperatures between 16°C (60.8°F) and 25°C (77°F). Weather in November »

December in Buenos Aires is hot and humid and full of crowds in the sun. The temperatures are high, ranging between 18°C (64.4°F) and 28°C (82.4°F). Weather in December »

What is the warmest month in Buenos Aires?

With an average high-temperature of 30.4°C (86.7°F) and an average low-temperature of 20.2°C (68.4°F), January is the warmest month in Buenos Aires, Argentina.

How much does it rain in Buenos Aires?

Throughout the year, in Buenos Aires, there are 102.6 rainfall days, and 1306.3mm (51.4") of precipitation is accumulated.

What is the month with the warmest sea water in Buenos Aires?

With an average sea temperature of 25°C (77°F), January is the month with the warmest seawater. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the rainiest month in Buenos Aires?

March is the month with the most rainfall in Buenos Aires. Rain falls for 10 days and accumulates 172.3mm (6.8") of precipitation.

What is the driest month in Buenos Aires?

The month with the least rainfall is June when the rain falls for 7.1 days and typically collects 54.8mm (2.2") of precipitation.

What is the coldest month in Buenos Aires?

The coldest month in Buenos Aires, Argentina, is July, with an average high-temperature of 16°C (60.8°F) and an average low-temperature of 7.7°C (45.9°F).

What is the month with the coldest sea water in Buenos Aires?

Month with the coldest seawater is July, with an average sea temperature of 11.9°C (53.4°F). Swimming in 11.9°C (53.4°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Average temperature - Buenos Aires, Argentina
Average humidity - Buenos Aires, Argentina
Average rainfall - Buenos Aires, Argentina

The wettest month (with the highest rainfall) is March (172.3mm).
The driest month (with the lowest rainfall) is June (54.8mm).

Average rainfall days - Buenos Aires, Argentina
Average sea temperature - Buenos Aires, Argentina

The best month for swimming (with the highest average sea temperature) is January (25°C).
The coldest month (with the lowest average sea temperature) is July (11.9°C).

Average daylight / Average sunshine - Buenos Aires, Argentina

The month with the longest days is December (Average daylight: 14.4h).
The month with shortest days is June (Average daylight: 9.9h).

The month with most sunshine is January (Average sunshine: 8.9h).
Months with least sunshine are June and July (Average sunshine: 4.8).

Average UV index - Buenos Aires, Argentina