Weather in Buenos Aires

On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are March, November, and December. Buenos Aires is in Argentina at 34.6°S. The 2001–2020 NASA POWER daily record describes a mild oceanic climate.

January is the warmest month (average 24.7°C, high 27.7°C) and July is the coolest (average 11.2°C, low 8.9°C). Rain is wet season runs from October to April, inside an annual total of 1103 mm. The wettest month is March at 123 mm; the driest is June at 54 mm.

Best months to visit Buenos Aires

The three months with the highest comfort score are March, November, and December: March (22.0°C average, 123 mm, 74% humidity); November (20.4°C average, 100 mm, 71% humidity); December (23.0°C average, 94 mm, 68% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at October–April instead of the score.

Temperature through the year

The heat peaks in January, when the typical afternoon is 27.7°C. The opposite pole is July, when mornings average 8.9°C.

Mean high across all twelve months is 20.6°C and mean low is 15.4°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Rainfall pattern

The wet season in Buenos Aires starts in October and ends in April (October, November, December, January, February, March, and April). March is the core of it at 123 mm. June is the other extreme, with 54 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. March averages 9 such days; June averages 6.

Distinctive months in Buenos Aires

January is the warmest month. Afternoon highs average 27.7°C and nights settle near 21.7°C, with 104 mm of rain. March is the wettest month — 123 mm and 9 rainy days, with 74% humidity. By April the wet season is ending. Buenos Aires still sees about 98 mm, but the next month is usually leaner.

In May, Buenos Aires averages 17.4°C by day and 13.1°C at night, with 74 mm of rain. June is the driest month, averaging only 54 mm across 6 rainy days. Highs sit near 14.5°C. The year bottoms out in July. Plan for 8.9°C at night and 13.4°C in the afternoon.

How Buenos Aires compares inside Argentina

Córdoba is about 648 km away: Buenos Aires is 1.0°C warmer than Córdoba in its hottest month and 304 mm wetter over the year than Córdoba. Córdoba’s wettest month is February (131 mm) versus March here.