December Weather in Uruguaiana, Brazil

Last updated: August 22, 2025

In December, the average temperature in Uruguaiana, Brazil hovers around 25°C (78°F). Expect a wide range of temperatures, with a minimum of 10°C (51°F) and a maximum soaring to 39°C (102°F). Prepare for 6 days of rainfall, accumulating to about 84 mm (3.3 in), all accompanied by a notable average humidity of 81%.

December Temperature in Uruguaiana

In December in Uruguaiana, the average temperature is 25°C (78°F). The maximum can reach 39°C (102°F), while the minimum can drop as low as 10°C (51°F). Be sure to pack a variety of clothing to prepare for both warm days and cooler evenings during your travels.

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

The chart illustrates December temperature patterns in Uruguaiana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Uruguaiana, December typically has an average temperature of 25°C (78°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Uruguaiana generated using information from the Copernicus Climate Change Service.

December Precipitation in Uruguaiana

In Uruguaiana in December, the precipitation amount is 84 mm (3.3 in) accumulated over the course of 6 days.

December Precipitation Trends in Uruguaiana

The chart displays monthly precipitation patterns in Uruguaiana, 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 Uruguaiana, December typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Uruguaiana

In Uruguaiana in December humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.

December Average Humidity in Uruguaiana

This chart illustrates the average monthly humidity levels in Uruguaiana, 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 Uruguaiana is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Uruguaiana

In Uruguaiana 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 Uruguaiana, you can check here.

Maximum UV Index Levels in Uruguaiana for December

The chart shows the monthly maximum UV Index (UVI) for Uruguaiana 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 Uruguaiana typically reaches 14, which falls under the extreme exposure category.

Data source: Uruguaiana 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 Uruguaiana Compares to Other Months

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

This table compares monthly weather conditions in Uruguaiana, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	167 mm (6.6 inches)	70%	extreme
February Weather	25°C (78°F)	71 mm (2.8 inches)	66%	extreme
March Weather	24°C (75°F)	105 mm (4.1 inches)	73%	extreme
April Weather	21°C (70°F)	125 mm (4.9 inches)	81%	very high
May Weather	17°C (63°F)	135 mm (5.3 inches)	82%	high
June Weather	15°C (59°F)	90 mm (3.6 inches)	77%	moderate
July Weather	14°C (57°F)	60 mm (2.4 inches)	69%	moderate
August Weather	16°C (60°F)	83 mm (3.3 inches)	51%	high
September Weather	18°C (65°F)	132 mm (5.2 inches)	59%	very high
October Weather	20°C (69°F)	137 mm (5.4 inches)	63%	extreme
November Weather	23°C (74°F)	108 mm (4.3 inches)	66%	extreme
December Weather	25°C (78°F)	84 mm (3.3 inches)	81%	extreme