January Weather in Jau, Brazil

Last updated: August 22, 2025

The average temperature in Jau, Brazil during January hovers around 25°C (78°F). Expect temperature fluctuations with minimums of 17°C (63°F) and maximums reaching 37°C (98°F). The region experiences precipitation of approximately 182 mm (7.2 in) spread across 16 days, contributing to an average humidity of 88%.

January Temperature in Jau

In January in Jau, the average temperature is 25°C (78°F). Maximums can reach 37°C (98°F), while minimums can drop as low as 17°C (63°F). This climate makes it an ideal time to explore Jau while enjoying warm and pleasant weather.

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

The chart illustrates January 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, January typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (98°F) and lows dropping to around 17°C (63°F).

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

January Precipitation in Jau

In Jau in January, the precipitation amount is 182 mm (7.2 in) over the course of 16 days.

January Precipitation Trends in Jau

The chart displays monthly precipitation patterns in Jau, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Jau, January typically receives around 182 mm (7.2 inches) of precipitation spread over approximately 16 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Jau

In Jau in January, humidity is 88%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities a sweat-drenched challenge and prompting frequent breaks in the shade to cool off.

January Average Humidity in Jau

This chart illustrates the average monthly humidity levels in Jau, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Jau is approximately 88%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Jau

In Jau in January, 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 Jau.

Maximum UV Index Levels in Jau for January

The chart shows the monthly maximum UV Index (UVI) for Jau in January, 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 January, the maximum UV index in Jau typically reaches 15, which falls under the extreme exposure category.

Data source: Jau January 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 January 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 January’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 January’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