December Weather in Uniao, Brazil

Last updated: August 22, 2025

In December, the average temperature in Uniao, Brazil hovers around 29°C (85°F), with a minimum of 23°C (73°F) and a potential maximum soaring up to 40°C (104°F). Expect some rain as precipitation typically reaches 87 mm (3.4 in) over 9 days, while the air remains humid with an average humidity of 76%. Stay prepared for the warm, tropical climate!

December Temperature in Uniao

In December in Uniao, the average temperature is 29°C (85°F). The maximum can reach 40°C (104°F), while the minimum can be as low as 23°C (73°F). Be sure to pack lightweight clothing and stay hydrated while enjoying your travels!

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

The chart illustrates December temperature patterns in Uniao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Uniao, December typically has an average temperature of 29°C (85°F), with highs reaching up to 40°C (104°F) and lows dropping to around 23°C (73°F).

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

December Precipitation in Uniao

In Uniao in December, the precipitation amount is 87 mm (3.4 in), occurring over a span of 9 days.

December Precipitation Trends in Uniao

The chart displays monthly precipitation patterns in Uniao, 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 Uniao, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 9 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 Uniao

In Uniao in December, humidity is 76%. With an average temperature of 29°C (85°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor exploration a sticky challenge but the lush surroundings and vibrant culture offer refreshing experiences in the shade.

December Average Humidity in Uniao

This chart illustrates the average monthly humidity levels in Uniao, 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 Uniao is approximately 76%, 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 Uniao

In Uniao in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Uniao.

Maximum UV Index Levels in Uniao for December

The chart shows the monthly maximum UV Index (UVI) for Uniao 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 Uniao typically reaches 13, which falls under the extreme exposure category.

Data source: Uniao 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 Uniao Compares to Other Months

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

This table compares monthly weather conditions in Uniao, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	201 mm (7.9 inches)	90%	extreme
February Weather	27°C (80°F)	325 mm (12.8 inches)	91%	extreme
March Weather	27°C (80°F)	385 mm (15.1 inches)	92%	extreme
April Weather	27°C (81°F)	301 mm (11.8 inches)	93%	extreme
May Weather	27°C (81°F)	109 mm (4.3 inches)	88%	extreme
June Weather	28°C (82°F)	15 mm (0.6 inches)	75%	extreme
July Weather	28°C (83°F)	17 mm (0.7 inches)	52%	extreme
August Weather	29°C (84°F)	3 mm (0.1 inches)	42%	extreme
September Weather	30°C (87°F)	2 mm (0.1 inches)	36%	extreme
October Weather	31°C (88°F)	5 mm (0.2 inches)	35%	extreme
November Weather	30°C (86°F)	48 mm (1.9 inches)	43%	extreme
December Weather	29°C (85°F)	87 mm (3.4 inches)	76%	extreme