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December Weather in Santo Augusto, Brazil

Last updated: August 22, 2025

In Santo Augusto, Brazil, the average temperature in December is a pleasant 24°C (76°F). However, be prepared for a temperature range that can dip to a cool 11°C (52°F) and soar to a sizzling 37°C (99°F). Expect approximately 104 mm (4.1 in) of precipitation spread over 12 days, contributing to the high average humidity of 85%.

December Temperature in Santo Augusto

In December in Santo Augusto, the average temperature is 24°C (76°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 11°C (52°F). This makes it an ideal time for travelers seeking pleasant weather and a mix of warm days and cooler evenings.

December Weather in Santo Augusto: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santo Augusto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Augusto, December typically has an average temperature of 24°C (76°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec767473686360586167697375
Data source: Temperature data for Santo Augusto 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 Santo Augusto

In Santo Augusto in December, the total precipitation amount is 104 mm (4.1 in) spread over 12 days.

December Precipitation Trends in Santo Augusto

The chart displays monthly precipitation patterns in Santo Augusto, 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 Santo Augusto, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec16112012611921215810682123191144104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santo Augusto

In Santo Augusto in December humidity is 85%. With an average temperature of 24°C (76°F), this humidity feels like walking through a warm, thick blanket that envelops you, making every step slightly more laborious and prompting a constant desire for refreshing coolness while exploring.

December Average Humidity in Santo Augusto

This chart illustrates the average monthly humidity levels in Santo Augusto, 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 Santo Augusto 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 Santo Augusto

In Santo Augusto 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 Santo Augusto.

Maximum UV Index Levels in Santo Augusto for December

The chart shows the monthly maximum UV Index (UVI) for Santo Augusto 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 Santo Augusto typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310656710131415
Data source: Santo Augusto 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 Santo Augusto Compares to Other Months

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

This table compares monthly weather conditions in Santo Augusto, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)161 mm (6.3 inches)79%extreme
February Weather24°C (75°F)120 mm (4.7 inches)74%extreme
March Weather23°C (73°F)126 mm (5.0 inches)72%extreme
April Weather20°C (69°F)119 mm (4.7 inches)78%very high
May Weather17°C (63°F)212 mm (8.4 inches)82%high
June Weather15°C (60°F)158 mm (6.2 inches)78%moderate
July Weather15°C (59°F)106 mm (4.2 inches)73%high
August Weather16°C (62°F)82 mm (3.2 inches)58%high
September Weather19°C (67°F)123 mm (4.8 inches)62%very high
October Weather21°C (70°F)191 mm (7.5 inches)65%extreme
November Weather23°C (73°F)144 mm (5.7 inches)76%extreme
December Weather24°C (76°F)104 mm (4.1 inches)85%extreme

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