December Weather in Altos, Brazil

Last updated: August 22, 2025

In Altos, Brazil, the average temperature in December reaches a warm 29°C (84°F). Expect a range with minimums as low as 22°C (72°F) and highs soaring to 40°C (104°F). During this month, precipitation totals around 95 mm (3.7 in), typically spread over 12 days, contributing to an average humidity level of 76%. Prepare for a mix of heat and occasional rain!

December Temperature in Altos

In December in Altos, the average temperature is 29°C (84°F), with maximums reaching 40°C (104°F) and minimums dropping as low as 22°C (72°F). This warm weather makes Altos an ideal destination for sun-seekers and outdoor enthusiasts alike.

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

The chart illustrates December temperature patterns in Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altos, December typically has an average temperature of 29°C (84°F), with highs reaching up to 40°C (104°F) and lows dropping to around 22°C (72°F).

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

December Precipitation in Altos

In Altos in December, the precipitation amount is 95 mm (3.7 in) over the course of 12 days.

December Precipitation Trends in Altos

The chart displays monthly precipitation patterns in Altos, 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 Altos, December typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 12 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 Altos

In Altos in December, humidity is 76%. With an average temperature of 29°C (84°F), this humidity feels like a warm embrace that clings to your skin, making outdoor activities a challenge and encouraging travelers to seek shade or cool refreshments frequently.

December Average Humidity in Altos

This chart illustrates the average monthly humidity levels in Altos, 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 Altos 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 Altos

In Altos 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 Altos, you can check here.

Maximum UV Index Levels in Altos for December

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

Data source: Altos 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 Altos Compares to Other Months

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

This table compares monthly weather conditions in Altos, 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)	199 mm (7.8 inches)	90%	extreme
February Weather	27°C (80°F)	366 mm (14.4 inches)	91%	extreme
March Weather	26°C (80°F)	387 mm (15.2 inches)	92%	extreme
April Weather	27°C (80°F)	294 mm (11.6 inches)	93%	extreme
May Weather	27°C (81°F)	81 mm (3.2 inches)	88%	extreme
June Weather	28°C (83°F)	9 mm (0.3 inches)	75%	extreme
July Weather	28°C (83°F)	12 mm (0.5 inches)	52%	extreme
August Weather	29°C (85°F)	3 mm (0.1 inches)	42%	extreme
September Weather	31°C (87°F)	2 mm (0.1 inches)	36%	extreme
October Weather	31°C (88°F)	11 mm (0.4 inches)	35%	extreme
November Weather	30°C (86°F)	45 mm (1.8 inches)	43%	extreme
December Weather	29°C (84°F)	95 mm (3.7 inches)	76%	extreme