December Weather in Viana, Brazil

Last updated: August 22, 2025

In December, the average temperature in Viana, Brazil hovers around 28°C (83°F). Expect a minimum of 23°C (74°F) and a scorching maximum of 38°C (101°F). Be prepared for 117 mm (4.6 in) of precipitation spread over 20 days, resulting in an average humidity of 82%. Stay hydrated and enjoy the warm, tropical climate!

December Temperature in Viana

In December in Viana, the average temperature is 28°C (83°F). Maximums can reach 38°C (101°F), while minimums can drop to as low as 23°C (74°F). It's a great time to visit if you enjoy warm weather and outdoor activities.

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

The chart illustrates December temperature patterns in Viana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viana, December typically has an average temperature of 28°C (83°F), with highs reaching up to 38°C (101°F) and lows dropping to around 23°C (74°F).

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

December Precipitation in Viana

In Viana in December, the total precipitation amount is 117 mm (4.6 in) over a span of 20 days.

December Precipitation Trends in Viana

The chart displays monthly precipitation patterns in Viana, 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 Viana, December typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 20 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Viana

In Viana in December, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

December Average Humidity in Viana

This chart illustrates the average monthly humidity levels in Viana, 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 Viana is approximately 82%, 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 Viana

In Viana 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 Viana.

Maximum UV Index Levels in Viana for December

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

Data source: Viana 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 Viana Compares to Other Months

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

This table compares monthly weather conditions in Viana, 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)	92%	extreme
February Weather	27°C (81°F)	336 mm (13.2 inches)	90%	extreme
March Weather	27°C (81°F)	421 mm (16.6 inches)	88%	extreme
April Weather	27°C (81°F)	402 mm (15.8 inches)	93%	extreme
May Weather	28°C (82°F)	185 mm (7.3 inches)	91%	extreme
June Weather	28°C (82°F)	72 mm (2.9 inches)	84%	extreme
July Weather	27°C (82°F)	49 mm (1.9 inches)	74%	extreme
August Weather	28°C (83°F)	19 mm (0.7 inches)	61%	extreme
September Weather	29°C (84°F)	17 mm (0.7 inches)	55%	extreme
October Weather	29°C (84°F)	30 mm (1.2 inches)	56%	extreme
November Weather	29°C (84°F)	68 mm (2.7 inches)	61%	extreme
December Weather	28°C (83°F)	117 mm (4.6 inches)	82%	extreme