Buenos Aires
Argentina
Long-term weather forecast
Long-term weather forecast

December 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
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) in this transitional month.
The rain gauge collects 104.1mm (4.1") as the rainy days are now down to 9. December is the beginning of the summer - enjoy swimming in the pleasant and warm waters that have heated up to 21°C (69.8°F) due to a lower humidity of 64%.

What is the temperature in December in Buenos Aires?

The average high-temperature, in December, is 28.5°C (83.3°F), while the average low-temperature is 18.2°C (64.8°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, in December is calculated to 30.8°C (87.4°F).

What is the least humid month in Buenos Aires?

December is the least humid month in Buenos Aires, Argentina, with an average relative humidity of 64%.

What is the average humidity in December in Buenos Aires?

In Buenos Aires, Argentina, the average relative humidity in December is 64%.

How much does it rain in Buenos Aires in December?

In December, the rain falls for 9.1 days. Throughout December, 102.4mm (4") of precipitation is accumulated.

What is the sea temperature in December in Buenos Aires?

In December, the average sea temperature is 22.6°C (72.7°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.6°C (72.7°F) water may be enjoyable.

When are the longest days in Buenos Aires?

The month with the longest days in Buenos Aires, Argentina, is December, with an average of 14.4h of daylight.

How many hours of daylight does Buenos Aires have in December?

In December, the average length of the day is 14.4h.

How many hours of sunshine does Buenos Aires have in December?

The average sunshine in December in Buenos Aires, Argentina, is 8.8h.

What is the month with the highest UV index in Buenos Aires?

January and December, with an average maximum UV index of 12, are months with the highest UV index in Buenos Aires.

How high is the UV index in December in Buenos Aires?

In Buenos Aires, Argentina, the average daily maximum UV index in December is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Buenos Aires, Argentina
  • Average high temperature in December: 28.5°C

The warmest month (with the highest average high temperature) is January (30.4°C).
The month with the lowest average high temperature is July (16°C).

  • Average low temperature in December: 18.2°C

The month with the highest average low temperature is January (20.2°C).
The coldest month (with the lowest average low temperature) is July (7.7°C).

Average humidity in December - Buenos Aires, Argentina
  • Average humidity in December: 64%

Months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is December (64%).

Average rainfall in December - Buenos Aires, Argentina
  • Average rainfall in December: 102.4mm

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 in December - Buenos Aires, Argentina
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is March (10 days).
The month with the lowest number of rainy days is May (6.6 days).

Average sea temperature in December - Buenos Aires, Argentina
  • Average sea temperature in December: 22.6°C

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 in December / Average sunshine in December - Buenos Aires, Argentina
  • Average daylight in December: 14.4h

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

  • Average sunshine in December: 8.8h

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 in December - Buenos Aires, Argentina
  • Average UV index in December: 12

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 2).