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December Weather in Santa Rosa, Brazil

Last updated: August 22, 2025

In December, the average temperature in Santa Rosa, Brazil is a warm 26°C (79°F). You can expect a minimum of 12°C (53°F) and highs reaching up to 39°C (103°F). With an average humidity of 85%, the climate feels quite sticky. Additionally, Santa Rosa sees about 83 mm (3.3 in) of precipitation spread over 10 days, so don't forget to bring your umbrella!

December Temperature in Santa Rosa

In December in Santa Rosa, the average temperature is 26°C (79°F). Maximum temperatures can reach 39°C (103°F), while minimums can drop to as low as 12°C (53°F). Be prepared for warm days and cooler nights, making it a great time for outdoor adventures and exploring the area.

December Weather in Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Rosa, December typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (103°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec797775706461596368717578
Data source: Temperature data for Santa Rosa 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 Santa Rosa

In Santa Rosa in December, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.

December Precipitation Trends in Santa Rosa

The chart displays monthly precipitation patterns in Santa Rosa, 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 Santa Rosa, December typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec148104115113198126987711617412483
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santa Rosa

In Santa Rosa in December, humidity is 85%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities feel stifling and exhausting for travelers.

December Average Humidity in Santa Rosa

This chart illustrates the average monthly humidity levels in Santa Rosa, 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 Santa Rosa is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%74%72%78%82%78%73%59%62%65%76%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Rosa

In Santa Rosa 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 Santa Rosa, you can check here.

Maximum UV Index Levels in Santa Rosa for December

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa 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 Santa Rosa typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141210656710131414
Data source: Santa Rosa 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 Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Santa Rosa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)148 mm (5.8 inches)79%extreme
February Weather25°C (77°F)104 mm (4.1 inches)74%extreme
March Weather24°C (75°F)115 mm (4.5 inches)72%extreme
April Weather21°C (71°F)113 mm (4.5 inches)78%very high
May Weather18°C (64°F)198 mm (7.8 inches)82%high
June Weather16°C (61°F)126 mm (5.0 inches)78%moderate
July Weather15°C (60°F)98 mm (3.9 inches)73%high
August Weather17°C (63°F)77 mm (3.0 inches)58%high
September Weather20°C (69°F)116 mm (4.5 inches)62%very high
October Weather22°C (72°F)174 mm (6.9 inches)65%extreme
November Weather24°C (75°F)124 mm (4.9 inches)76%extreme
December Weather26°C (79°F)83 mm (3.3 inches)85%extreme

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