Buenos Aires
Long term weather forecast
Long term weather forecast

December weather forecast and Climate
Buenos Aires, Argentina

December in Buenos Aires is hot and humid and full of crowds in the sun. The temperatures are high, ranging between 64.4°F (18°C) and 82.4°F (28°C) in this transitional month. The rain gauge collects around 4.1" (104.1mm) 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 69.8°F (21°C) due to lower humidity of 64%.
  • Average high temperature in December: 28.5°C

Warmest month (with highest average high temperature) is January (30.4°C).
Month with lowest average high temperature is July (16°C).

  • Average low temperature in December: 18.2°C

Month with highest average low temperature is January (20.2°C).
Coldest month (with lowest average low temperature) is July (7.7°C).

  • Average humidity in December: 64%

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

  • Average rainfall in December: 102.4mm

Wettest month (with highest rainfall) is March (172.3mm).
Driest month (with lowest rainfall) is June (54.8mm).

  • Average rainfall days in December: 9.1 days

Month with highest number of rainy days is March (10 days).
Month with lowest number of rainy days is May (6.6 days).

  • Average sea temperature in December: 22.6°C

Best month for swimming (with highest average sea temperature) is January (25°C).
Coldest month (with lowest average sea temperature) is July (11.9°C).

  • Average daylight in December: 14h

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

  • Average sunshine in December: 8.8h

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: 12

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