December Weather in Rio do Sul, Brazil

Last updated: August 22, 2025

In December, the average temperature in Rio do Sul, Brazil hovers around 22°C (72°F), making it a pleasant time to visit. Expect a minimum chill of 11°C (52°F) and a warm peak of 34°C (94°F). However, be prepared for a fair amount of precipitation, averaging 174 mm (6.8 in) over 20 days, and brace yourself for relatively high humidity levels at 88%.

December Temperature in Rio do Sul

In December in Rio do Sul, the average temperature is a comfortable 22°C (72°F), making it an ideal time for outdoor activities. The maximum can reach a sweltering 34°C (94°F) while the minimum can drop to a cool 11°C (52°F), so travelers should be prepared for both warmth and cool evenings. Overall, this month offers a pleasant climate for exploring and enjoying all that Rio do Sul has to offer.

December Weather in Rio do Sul: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio do Sul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio do Sul, December typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (52°F).

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

December Precipitation in Rio do Sul

In Rio do Sul in December, the total precipitation amount is 174 mm (6.8 in) over a span of 20 days.

December Precipitation Trends in Rio do Sul

The chart displays monthly precipitation patterns in Rio do Sul, 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 Rio do Sul, December typically receives around 174 mm (6.8 inches) of precipitation spread over approximately 20 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 Rio do Sul

In Rio do Sul in December humidity is 88%. With an average temperature of 22°C (72°F), this humidity feels like a warm, steamy embrace that clings to your skin, making outdoor exploration a sweaty challenge but also a vibrant experience as the air is thick with the scent of nature and vibrant local life.

December Average Humidity in Rio do Sul

This chart illustrates the average monthly humidity levels in Rio do Sul, 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 Rio do Sul is approximately 88%, 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 Rio do Sul

In Rio do Sul in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Rio do Sul.

Maximum UV Index Levels in Rio do Sul for December

The chart shows the monthly maximum UV Index (UVI) for Rio do Sul 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 Rio do Sul typically reaches 15, which falls under the extreme exposure category.

Data source: Rio do Sul 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 Rio do Sul Compares to Other Months

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

This table compares monthly weather conditions in Rio do Sul, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	155 mm (6.1 inches)	86%	extreme
February Weather	22°C (73°F)	130 mm (5.1 inches)	83%	extreme
March Weather	22°C (71°F)	109 mm (4.3 inches)	85%	extreme
April Weather	19°C (66°F)	69 mm (2.7 inches)	85%	very high
May Weather	16°C (61°F)	101 mm (4.0 inches)	86%	high
June Weather	15°C (59°F)	107 mm (4.2 inches)	85%	moderate
July Weather	13°C (56°F)	50 mm (2.0 inches)	80%	high
August Weather	15°C (58°F)	81 mm (3.2 inches)	79%	very high
September Weather	18°C (64°F)	100 mm (4.0 inches)	82%	extreme
October Weather	19°C (66°F)	134 mm (5.3 inches)	82%	extreme
November Weather	20°C (68°F)	123 mm (4.8 inches)	86%	extreme
December Weather	22°C (72°F)	174 mm (6.8 inches)	88%	extreme