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December Weather in Castelli, Argentina

Last updated: August 22, 2025

In December, the average temperature in Castelli, Argentina reaches a warm 28°C (82°F). While the mercury can dip to a cool 14°C (57°F), it can also soar to a sweltering 42°C (109°F). Expect about 58 mm (2.3 in) of precipitation over 7 days, accompanied by a muggy average humidity of 76%.

December Temperature in Castelli

In December in Castelli, the average temperature is 28°C (82°F). Maximums can reach 42°C (109°F), while minimums can drop to as low as 14°C (57°F). Be prepared for a range of temperatures to fully enjoy your travel experience.

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

The chart illustrates December temperature patterns in Castelli, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelli, December typically has an average temperature of 28°C (82°F), with highs reaching up to 42°C (109°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec838077726662616571757982
Data source: Temperature data for Castelli 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 Castelli

In Castelli in December, the precipitation amount is 58 mm (2.3 in) over the course of 7 days.

December Precipitation Trends in Castelli

The chart displays monthly precipitation patterns in Castelli, 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 Castelli, December typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec12293957585322922609013458
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castelli

In Castelli in December humidity is 76%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket enveloping you, making travel feel sticky and sluggish as you navigate through the heat, leaving you constantly seeking shade and refreshing beverages.

December Average Humidity in Castelli

This chart illustrates the average monthly humidity levels in Castelli, 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 Castelli is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%65%69%78%84%70%51%36%45%46%61%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castelli

In Castelli in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Castelli.

Maximum UV Index Levels in Castelli for December

The chart shows the monthly maximum UV Index (UVI) for Castelli 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 Castelli typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14141310756810131415
Data source: Castelli 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 Castelli Compares to Other Months

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

This table compares monthly weather conditions in Castelli, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)122 mm (4.8 inches)72%extreme
February Weather27°C (81°F)93 mm (3.7 inches)65%extreme
March Weather25°C (78°F)95 mm (3.7 inches)69%extreme
April Weather22°C (73°F)75 mm (3.0 inches)78%very high
May Weather19°C (66°F)85 mm (3.3 inches)84%high
June Weather17°C (62°F)32 mm (1.3 inches)70%moderate
July Weather16°C (61°F)29 mm (1.1 inches)51%high
August Weather18°C (66°F)22 mm (0.8 inches)36%very high
September Weather22°C (71°F)60 mm (2.4 inches)45%very high
October Weather24°C (75°F)90 mm (3.5 inches)46%extreme
November Weather26°C (79°F)134 mm (5.3 inches)61%extreme
December Weather28°C (82°F)58 mm (2.3 inches)76%extreme

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