December Weather in Jau, Brazil

Last updated: August 22, 2025

In December, the average temperature in Jau, Brazil is a warm 25°C (77°F), with minimums dipping to 15°C (59°F) and maximums soaring up to 36°C (97°F). Expect precipitation of about 137 mm (5.4 in) spread over 18 days, contributing to an average humidity of 83%. Perfect for those who enjoy a tropical atmosphere!

December Temperature in Jau

In December in Jau, the average temperature is 25°C (77°F). Maximums can reach 36°C (97°F), and minimums can be as low as 15°C (59°F). It's an ideal time to explore outdoor activities and enjoy the pleasant weather.

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

The chart illustrates December temperature patterns in Jau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jau, December typically has an average temperature of 25°C (77°F), with highs reaching up to 36°C (97°F) and lows dropping to around 15°C (59°F).

Data source: Temperature data for Jau generated using information from the Copernicus Climate Change Service.

December Precipitation in Jau

In Jau in December, the total precipitation amount is 137 mm (5.4 in) over the course of 18 days.

December Precipitation Trends in Jau

The chart displays monthly precipitation patterns in Jau, 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 Jau, December typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Jau

In Jau in December humidity is 83%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket, making it essential for travelers to stay hydrated and seek shade to enjoy their adventures comfortably.

December Average Humidity in Jau

This chart illustrates the average monthly humidity levels in Jau, 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 Jau is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jau

In Jau 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 Jau.

Maximum UV Index Levels in Jau for December

The chart shows the monthly maximum UV Index (UVI) for Jau 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 Jau typically reaches 16, which falls under the extreme exposure category.

Data source: Jau 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 Jau Compares to Other Months

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

This table compares monthly weather conditions in Jau, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (78°F)	182 mm (7.2 inches)	88%	extreme
February Weather	25°C (77°F)	139 mm (5.5 inches)	87%	extreme
March Weather	25°C (78°F)	87 mm (3.4 inches)	86%	extreme
April Weather	23°C (74°F)	46 mm (1.8 inches)	82%	extreme
May Weather	21°C (69°F)	33 mm (1.3 inches)	76%	very high
June Weather	20°C (69°F)	16 mm (0.6 inches)	71%	high
July Weather	20°C (67°F)	8 mm (0.3 inches)	67%	high
August Weather	20°C (69°F)	38 mm (1.5 inches)	59%	very high
September Weather	24°C (76°F)	28 mm (1.1 inches)	54%	extreme
October Weather	24°C (76°F)	86 mm (3.4 inches)	50%	extreme
November Weather	24°C (76°F)	116 mm (4.6 inches)	74%	extreme
December Weather	25°C (77°F)	137 mm (5.4 inches)	83%	extreme