September Weather in Jau, Brazil

Last updated: August 22, 2025

In September, the average temperature in Jau, Brazil is a pleasant 24°C (76°F). Expect a temperature range where the minimum dips to 10°C (51°F) and can soar up to a sizzling 38°C (100°F). Rainfall is relatively light, with 28 mm (1.1 in) of precipitation spread across just 4 days. The average humidity sits at a comfortable 54%, making it a great time to explore!

September Temperature in Jau

In September in Jau, the average temperature is 24°C (76°F). The maximum can reach 38°C (100°F), while the minimum can drop as low as 10°C (51°F). Be prepared for a warm climate with a chance of cooler evenings when traveling.

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

The chart illustrates September 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, September typically has an average temperature of 24°C (76°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).

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

September Precipitation in Jau

In Jau in September, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

September Precipitation Trends in Jau

The chart displays monthly precipitation patterns in Jau, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Jau, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Jau

In Jau in September humidity is 54%. With an average temperature of 24°C (76°F), this humidity feels like a warm embrace, making it comfortable for exploring the sights while also inviting you to take refreshing breaks in the shade.

September Average Humidity in Jau

This chart illustrates the average monthly humidity levels in Jau, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Jau is approximately 54%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Jau

In Jau in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Jau.

Maximum UV Index Levels in Jau for September

The chart shows the monthly maximum UV Index (UVI) for Jau in September, 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 September, the maximum UV index in Jau typically reaches 12, which falls under the extreme exposure category.

Data source: Jau September 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 September 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 September’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 September’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