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December Weather in Altamira, Brazil

Last updated: August 22, 2025

In December, the average temperature in Altamira, Brazil is a warm 27°C (80°F). Expect a range from a minimum of 22°C (72°F) to a steamy maximum of 35°C (95°F). With 202 mm (8.0 in) of precipitation spread over 25 days, it’s wise to have an umbrella handy. The weather is characterized by an average humidity of 70%, making for a muggy yet vibrant atmosphere.

December Temperature in Altamira

In December in Altamira, the average temperature is 27°C (80°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 22°C (72°F). This makes it a great time to enjoy outdoor activities and explore the local attractions in a warm and pleasant climate.

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

The chart illustrates December temperature patterns in Altamira, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altamira, December typically has an average temperature of 27°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec787879798080818283838280
Data source: Temperature data for Altamira 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 Altamira

In Altamira in December, the precipitation amount is 202 mm (8.0 in) occurring over the course of 25 days.

December Precipitation Trends in Altamira

The chart displays monthly precipitation patterns in Altamira, 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 Altamira, December typically receives around 202 mm (8.0 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec2232722812931756234363441134202
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Altamira

In Altamira in December humidity is 70%. With an average temperature of 27°C (80°F), this humidity feels like you're enveloped in a warm, heavy blanket, making traveling feel a bit more challenging. The air tends to weigh you down, and you may find yourself needing to take frequent breaks to stay refreshed.

December Average Humidity in Altamira

This chart illustrates the average monthly humidity levels in Altamira, 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 Altamira is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%69%70%85%90%83%66%51%47%46%46%70%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Altamira

In Altamira in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Altamira.

Maximum UV Index Levels in Altamira for December

The chart shows the monthly maximum UV Index (UVI) for Altamira 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 Altamira typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151516161311111212121413
Data source: Altamira 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 Altamira Compares to Other Months

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

This table compares monthly weather conditions in Altamira, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)223 mm (8.8 inches)85%extreme
February Weather26°C (79°F)271 mm (10.7 inches)69%extreme
March Weather26°C (79°F)281 mm (11.1 inches)70%extreme
April Weather26°C (79°F)293 mm (11.5 inches)85%extreme
May Weather26°C (80°F)175 mm (6.9 inches)90%extreme
June Weather27°C (80°F)62 mm (2.5 inches)82%extreme
July Weather27°C (81°F)34 mm (1.3 inches)66%extreme
August Weather28°C (83°F)36 mm (1.4 inches)51%extreme
September Weather28°C (83°F)34 mm (1.3 inches)47%extreme
October Weather28°C (84°F)41 mm (1.6 inches)46%extreme
November Weather28°C (82°F)134 mm (5.3 inches)46%extreme
December Weather27°C (80°F)202 mm (8.0 inches)70%extreme

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