Buenos Aires
Argentina
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Buenos Aires, Argentina

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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 lower humidity of 64%.
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  • The 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).

  • The 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).

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  • The 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%).

  • The 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).

  • The 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).

  • The 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).

  • The average daylight in December: 14h

Months with the longest days are January, November and December (Average daylight: 14h).
Months with shortest days are May, June and July (Average daylight: 10h).

  • The 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).

  • The 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).

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