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December Weather in Santiago, Paraguay

Last updated: August 31, 2025

In December, the average temperature in Santiago, Paraguay reaches a warm 27°C (80°F). Temperatures can vary significantly, with a comfortable low of 15°C (59°F) and highs soaring to 38°C (100°F). Expect about 86 mm (3.4 in) of precipitation over 8 days, accompanied by a high average humidity of 84%, creating a lush and vibrant atmosphere.

December Temperature in Santiago

In December in Santiago, the average temperature is 27°C (80°F), with maximums reaching up to 38°C (100°F) and minimums dropping as low as 15°C (59°F). This makes it a perfect time to explore outdoor activities while enjoying warm weather and pleasant evenings.

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

The chart illustrates December temperature patterns in Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago, December typically has an average temperature of 27°C (80°F), with highs reaching up to 38°C (100°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec828077726663616469737780
Data source: Temperature data for Santiago 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 Santiago

In Santiago in December, the precipitation amount reaches 86 mm (3.4 in) over the course of 8 days.

December Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, 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 Santiago, December typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec153891201372089874689116514587
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santiago

In Santiago in December, humidity is 84%. With an average temperature of 27°C (80°F), this humidity feels like a thick, warm blanket enveloping you, making travel feel sluggish and exhausting.

December Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, 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 Santiago is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%71%74%82%82%73%67%49%54%58%69%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santiago

In Santiago 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 Santiago, you can check here.

Maximum UV Index Levels in Santiago for December

The chart shows the monthly maximum UV Index (UVI) for Santiago 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 Santiago typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310656710131414
Data source: Santiago 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 Santiago Compares to Other Months

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

This table compares monthly weather conditions in Santiago, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)153 mm (6.0 inches)77%extreme
February Weather27°C (80°F)89 mm (3.5 inches)71%extreme
March Weather25°C (78°F)120 mm (4.7 inches)74%extreme
April Weather22°C (73°F)137 mm (5.4 inches)82%very high
May Weather19°C (66°F)208 mm (8.2 inches)82%high
June Weather17°C (63°F)98 mm (3.9 inches)73%moderate
July Weather16°C (61°F)74 mm (2.9 inches)67%high
August Weather18°C (65°F)68 mm (2.7 inches)49%high
September Weather21°C (69°F)91 mm (3.6 inches)54%very high
October Weather23°C (74°F)165 mm (6.5 inches)58%extreme
November Weather25°C (77°F)145 mm (5.7 inches)69%extreme
December Weather27°C (80°F)86 mm (3.4 inches)84%extreme

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