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December Weather in Rosario do Sul, Brazil

Last updated: August 22, 2025

In December, the average temperature in Rosario do Sul, Brazil hovers around 25°C (76°F), with extremes ranging from a cool 10°C (49°F) to a scorching 39°C (102°F). Expect about 86 mm (3.4 in) of precipitation spread over 7 days, accompanied by an average humidity level of 73%. Whether you're exploring the vibrant culture or enjoying the local cuisine, make sure to prepare for a mix of sunny days and refreshing showers!

December Temperature in Rosario do Sul

In December in Rosario do Sul, the average temperature is 25°C (76°F). The maximum can reach 39°C (102°F), and the minimum can be as low as 10°C (49°F). This climate makes Rosario do Sul an ideal destination for travelers seeking warm and diverse weather.

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

The chart illustrates December temperature patterns in Rosario 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 Rosario do Sul, December typically has an average temperature of 25°C (76°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec787673696158565963677276
Data source: Temperature data for Rosario do Sul generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Rosario do Sul

In Rosario do Sul in December, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.

December Precipitation Trends in Rosario do Sul

The chart displays monthly precipitation patterns in Rosario 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 Rosario do Sul, December typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec14210311870147111919716916010486
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rosario do Sul

In Rosario do Sul in December, humidity is 73%. With an average temperature of 25°C (76°F), this humidity feels like walking through a warm, wet blanket, making travel feel sluggish and sticky, as the air clings to your skin and saps your energy while exploring.

December Average Humidity in Rosario do Sul

This chart illustrates the average monthly humidity levels in Rosario 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 Rosario do Sul is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec64%58%68%79%79%78%70%55%62%64%64%73%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rosario do Sul

In Rosario 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 Rosario do Sul.

Maximum UV Index Levels in Rosario do Sul for December

The chart shows the monthly maximum UV Index (UVI) for Rosario 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 Rosario do Sul typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412964579121415
Data source: Rosario 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 Rosario do Sul Compares to Other Months

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

This table compares monthly weather conditions in Rosario do Sul, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)142 mm (5.6 inches)63%extreme
February Weather24°C (76°F)103 mm (4.0 inches)58%extreme
March Weather23°C (73°F)118 mm (4.6 inches)68%extreme
April Weather20°C (69°F)70 mm (2.8 inches)78%very high
May Weather16°C (61°F)147 mm (5.8 inches)79%high
June Weather14°C (58°F)111 mm (4.4 inches)78%moderate
July Weather13°C (56°F)91 mm (3.6 inches)70%moderate
August Weather15°C (59°F)97 mm (3.8 inches)55%high
September Weather17°C (63°F)169 mm (6.7 inches)62%very high
October Weather20°C (67°F)160 mm (6.3 inches)64%extreme
November Weather22°C (72°F)104 mm (4.1 inches)64%extreme
December Weather25°C (76°F)86 mm (3.4 inches)73%extreme

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