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December Weather in Portena, Argentina

Last updated: August 22, 2025

In December, the average temperature in Portena, Argentina hovers around 25°C (77°F), offering a delightful climate for outdoor activities. However, be prepared for a temperature range that can dip to a brisk 9°C (48°F) or soar to a scorching 40°C (105°F). Rainfall is moderate, with an average precipitation of 102 mm (4.0 in) spread over about 8 days. Expect a comfortable average humidity of 57%, making for pleasant days and cooler evenings.

December Temperature in Portena

In December in Portena, the average temperature is 25°C (77°F), with maximums reaching 40°C (105°F) and minimums dropping as low as 9°C (48°F). It's essential to pack accordingly to enjoy a comfortable and pleasant trip.

December Weather in Portena: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Portena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portena, December typically has an average temperature of 25°C (77°F), with highs reaching up to 40°C (105°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec787572676055535863687377
Data source: Temperature data for Portena generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Portena

In Portena in December, the precipitation amount is 102 mm (4.0 in) over the course of 8 days.

December Precipitation Trends in Portena

The chart displays monthly precipitation patterns in Portena, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Portena, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1169394110532022213391105102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Portena

In Portena in December, humidity is 57%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls and outdoor adventures, though it's advisable to stay hydrated and take breaks in the shade.

December Average Humidity in Portena

This chart illustrates the average monthly humidity levels in Portena, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Portena is approximately 57%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%57%65%76%83%78%58%54%59%50%53%57%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Portena

In Portena in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Portena, you can check here.

Maximum UV Index Levels in Portena for December

The chart shows the monthly maximum UV Index (UVI) for Portena in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Portena typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141312964579121414
Data source: Portena December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Portena Compares to Other Months

Weather in Portena varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Portena, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Portena, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)116 mm (4.6 inches)51%extreme
February Weather24°C (75°F)93 mm (3.7 inches)57%extreme
March Weather22°C (72°F)94 mm (3.7 inches)65%extreme
April Weather19°C (67°F)109 mm (4.3 inches)76%very high
May Weather15°C (60°F)53 mm (2.1 inches)83%high
June Weather13°C (55°F)20 mm (0.8 inches)78%moderate
July Weather12°C (54°F)21 mm (0.8 inches)58%moderate
August Weather14°C (58°F)21 mm (0.8 inches)54%high
September Weather17°C (63°F)32 mm (1.3 inches)59%very high
October Weather20°C (68°F)91 mm (3.6 inches)50%extreme
November Weather23°C (73°F)105 mm (4.1 inches)53%extreme
December Weather25°C (77°F)102 mm (4.0 inches)57%extreme

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