Buenos Aires weather in December 2025

Expect daytime maximum temperatures of 82°F in Buenos Aires, Argentina in December based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 3.6 inches of rainfall in the month.

  • 82°F maximum daytime temperature in December in Buenos Aires82
    82°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in December in Buenos Aires9
    9 days with some rainfall
  • 64°F minimum night-time temperature in December in Buenos Aires64
    64°F min night temperature
  • 14 hours of daylight per day in December in Buenos Aires14
    14 hours of daylight per day
  • Moderate heat & humidity in December in Buenos AiresM
    Moderate heat & humidity
  • 3.6 inches monthly rainfall in December in Buenos Aires3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Buenos Aires11
    11+ (Extreme) UV index
  • 73°F sea temperature in December in Buenos Aires73
    73°F sea temperature

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The December weather guide for Argentina (Buenos Aires) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Buenos Aires

How hot is it in Buenos Aires in December?

Daytime temperatures usually reach 82°F in Buenos Aires in December with moderate heat and humidity, falling to 64°F at night.

How sunny is it in Buenos Aires in December?

There are normally 8 hours of bright sunshine each day in Buenos Aires in December - that's 57% of daylight hours.

How warm is the sea around Buenos Aires in December?

The average sea temperature around Buenos Aires in December is 73°F.

Does it rain in Buenos Aires in December?

There are usually 9 days with some rain in Buenos Aires in December and the average monthly rainfall is 3.6 inches.

Buenos Aires December sunrise & sunset times

Browse the sunrise and sunset times for Buenos Aires in December 2025. Select a month to view Buenos Aires sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 05:34 19:52
Tuesday, 16th December 2025 05:35 20:04
Wednesday, 31st December 2025 05:44 20:10

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