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December Weather in Monteiro, Brazil

Last updated: August 22, 2025

In Monteiro, Brazil, the average temperature in December is a warm 27°C (80°F). Expect a delightful range, with minimum temperatures dipping to 19°C (66°F) and maximums reaching up to 36°C (97°F). During this month, you can anticipate 10 mm (0.4 in) of precipitation spread across 1 day, accompanied by an average humidity of 72%, creating a pleasantly tropical atmosphere.

December Temperature in Monteiro

In December in Monteiro, the average temperature is 27°C (80°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 19°C (66°F). This climate makes Monteiro an ideal destination for travelers looking to enjoy warm and pleasant weather.

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

The chart illustrates December temperature patterns in Monteiro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monteiro, December typically has an average temperature of 27°C (80°F), with highs reaching up to 36°C (97°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec808079787674737476798080
Data source: Temperature data for Monteiro 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 Monteiro

In Monteiro in December, the precipitation amount is 10 mm (0.4 in) over the course of 1 day.

December Precipitation Trends in Monteiro

The chart displays monthly precipitation patterns in Monteiro, 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 Monteiro, December typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec20569986431917532511
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Monteiro

In Monteiro in December humidity is 72%. With an average temperature of 27°C (80°F), this humidity feels like a warm, sticky embrace that can make outdoor activities exhausting and often requires frequent breaks in the shade for travelers to stay comfortable.

December Average Humidity in Monteiro

This chart illustrates the average monthly humidity levels in Monteiro, 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 Monteiro is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%87%88%89%90%89%86%84%79%74%71%72%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Monteiro

In Monteiro 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 Monteiro.

Maximum UV Index Levels in Monteiro for December

The chart shows the monthly maximum UV Index (UVI) for Monteiro 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 Monteiro typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141515141211111214141515
Data source: Monteiro 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 Monteiro Compares to Other Months

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

This table compares monthly weather conditions in Monteiro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (80°F)20 mm (0.8 inches)84%extreme
February Weather27°C (80°F)56 mm (2.2 inches)87%extreme
March Weather26°C (79°F)99 mm (3.9 inches)88%extreme
April Weather25°C (78°F)86 mm (3.4 inches)89%extreme
May Weather24°C (76°F)43 mm (1.7 inches)90%extreme
June Weather23°C (74°F)19 mm (0.8 inches)89%extreme
July Weather23°C (73°F)17 mm (0.7 inches)86%extreme
August Weather23°C (74°F)5 mm (0.2 inches)84%extreme
September Weather25°C (76°F)3 mm (0.1 inches)79%extreme
October Weather26°C (79°F)2 mm (0.1 inches)74%extreme
November Weather27°C (80°F)5 mm (0.2 inches)71%extreme
December Weather27°C (80°F)10 mm (0.4 inches)72%extreme

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