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December Weather in Boa Vista, Brazil

Last updated: August 22, 2025

In December, the average temperature in Boa Vista, Brazil is a warm 28°C (83°F), with minimums dipping to 23°C (73°F) and maximums soaring to 36°C (97°F). You can expect 75 mm (3.0 in) of precipitation spread over 13 days, resulting in an average humidity of 49%.

December Temperature in Boa Vista

In December, in Boa Vista, the average temperature is a warm 28°C (83°F). Maximums can reach a sweltering 36°C (97°F), while minimums can drop to a comfortable 23°C (73°F). Pack lightweight clothing and stay hydrated to fully enjoy your travels in this warm climate!

December Weather in Boa Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Boa Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boa Vista, December typically has an average temperature of 28°C (83°F), with highs reaching up to 36°C (97°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec828384838079798182848382
Data source: Temperature data for Boa Vista 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 Boa Vista

In Boa Vista in December, the precipitation amount is 75 mm (3.0 in) over the course of 13 days.

December Precipitation Trends in Boa Vista

The chart displays monthly precipitation patterns in Boa Vista, 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 Boa Vista, December typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec5233701643843603041831197113575
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Boa Vista

In Boa Vista in December humidity is 49%. With an average temperature of 28°C (83°F), this humidity feels like a warm, inviting embrace, making it quite pleasant for traveling, although visitors may feel a bit sticky during the midday heat.

December Average Humidity in Boa Vista

This chart illustrates the average monthly humidity levels in Boa Vista, 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 Boa Vista is approximately 49%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec44%40%38%39%60%89%84%77%60%40%44%49%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Boa Vista

In Boa Vista 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 Boa Vista.

Maximum UV Index Levels in Boa Vista for December

The chart shows the monthly maximum UV Index (UVI) for Boa Vista 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 Boa Vista typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516161413121313131313
Data source: Boa Vista 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 Boa Vista Compares to Other Months

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

This table compares monthly weather conditions in Boa Vista, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)52 mm (2.1 inches)44%extreme
February Weather29°C (84°F)33 mm (1.3 inches)40%extreme
March Weather29°C (84°F)70 mm (2.7 inches)38%extreme
April Weather28°C (83°F)164 mm (6.5 inches)39%extreme
May Weather27°C (80°F)384 mm (15.1 inches)60%extreme
June Weather26°C (80°F)360 mm (14.2 inches)89%extreme
July Weather26°C (79°F)304 mm (12.0 inches)84%extreme
August Weather27°C (81°F)183 mm (7.2 inches)77%extreme
September Weather28°C (83°F)119 mm (4.7 inches)60%extreme
October Weather29°C (84°F)71 mm (2.8 inches)40%extreme
November Weather29°C (84°F)135 mm (5.3 inches)44%extreme
December Weather28°C (83°F)75 mm (3.0 inches)49%extreme

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