nomadseason

December Weather in Mariana, Brazil

Last updated: August 22, 2025

In December, the average temperature in Mariana, Brazil hovers around 21°C (71°F). Expect a range from a pleasant 12°C (55°F) to a warm 31°C (87°F). However, be prepared for the weather, as precipitation can reach 277 mm (10.9 in) over 23 days, coupled with an average humidity of 68%.

December Temperature in Mariana

In December in Mariana, the average temperature is 21°C (71°F). Maximums can reach 31°C (87°F) and minimums can be as low as 12°C (55°F). This pleasant climate makes Mariana an ideal destination for travelers looking to enjoy mild weather.

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

The chart illustrates December temperature patterns in Mariana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mariana, December typically has an average temperature of 21°C (71°F), with highs reaching up to 31°C (87°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec727171686463616268696970
Data source: Temperature data for Mariana generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Mariana

In Mariana in December, the precipitation amount is 277 mm (10.9 in) over a duration of 23 days.

December Precipitation Trends in Mariana

The chart displays monthly precipitation patterns in Mariana, 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 Mariana, December typically receives around 277 mm (10.9 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec19328119080531573555192256277
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Mariana

In Mariana in December, humidity is 68%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting for leisurely strolls and outdoor adventures.

December Average Humidity in Mariana

This chart illustrates the average monthly humidity levels in Mariana, 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 Mariana is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%85%88%86%82%82%77%72%63%48%61%68%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mariana

In Mariana in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Mariana.

Maximum UV Index Levels in Mariana for December

The chart shows the monthly maximum UV Index (UVI) for Mariana 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 Mariana typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171514129781112141416
Data source: Mariana 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 Mariana Compares to Other Months

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

This table compares monthly weather conditions in Mariana, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)193 mm (7.6 inches)83%extreme
February Weather22°C (71°F)281 mm (11.1 inches)85%extreme
March Weather22°C (71°F)190 mm (7.5 inches)87%extreme
April Weather20°C (68°F)80 mm (3.1 inches)86%extreme
May Weather18°C (64°F)53 mm (2.1 inches)82%very high
June Weather17°C (63°F)15 mm (0.6 inches)82%high
July Weather16°C (61°F)7 mm (0.3 inches)77%very high
August Weather17°C (62°F)35 mm (1.4 inches)72%extreme
September Weather20°C (68°F)55 mm (2.1 inches)63%extreme
October Weather21°C (69°F)192 mm (7.6 inches)48%extreme
November Weather20°C (69°F)256 mm (10.1 inches)61%extreme
December Weather21°C (71°F)277 mm (10.9 inches)68%extreme

Compare Mariana's Climate with Cities Worldwide