September Weather in Acu, Brazil

Last updated: August 22, 2025

In September, the average temperature in Acu, Brazil is a warm 29°C (84°F), with temperatures ranging from a minimum of 21°C (70°F) to a sizzling maximum of 37°C (99°F). Expect a very dry climate with only 1 mm (0.0 in) of precipitation over 0 days, and enjoy the balmy warmth complemented by an average humidity of 71%.

September Temperature in Acu

In September in Acu, the average temperature is 29°C (84°F), with maximums reaching 37°C (99°F) and minimums dropping to as low as 21°C (70°F). This warm climate makes Acu an ideal destination for travelers seeking sunny and pleasant weather.

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

The chart illustrates September temperature patterns in Acu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Acu, September typically has an average temperature of 29°C (84°F), with highs reaching up to 37°C (99°F) and lows dropping to around 21°C (70°F).

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

September Precipitation in Acu

In Acu in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Acu

The chart displays monthly precipitation patterns in Acu, 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 Acu, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 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 Acu

In Acu in September, humidity is 71%. With an average temperature of 29°C (84°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling quite uncomfortable as the air clings to your skin and requires frequent breaks to stay hydrated.

September Average Humidity in Acu

This chart illustrates the average monthly humidity levels in Acu, 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 Acu is approximately 71%, 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 Acu

In Acu in September, 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 Acu.

Maximum UV Index Levels in Acu for September

The chart shows the monthly maximum UV Index (UVI) for Acu 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 Acu typically reaches 13, which falls under the extreme exposure category.

Data source: Acu 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 Acu Compares to Other Months

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

This table compares monthly weather conditions in Acu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	29°C (85°F)	27 mm (1.1 inches)	84%	extreme
February Weather	29°C (84°F)	124 mm (4.9 inches)	85%	extreme
March Weather	28°C (83°F)	121 mm (4.8 inches)	86%	extreme
April Weather	28°C (82°F)	97 mm (3.8 inches)	85%	extreme
May Weather	28°C (82°F)	70 mm (2.8 inches)	86%	extreme
June Weather	28°C (82°F)	30 mm (1.2 inches)	82%	extreme
July Weather	27°C (81°F)	35 mm (1.4 inches)	75%	extreme
August Weather	28°C (83°F)	1 mm (0.0 inches)	73%	extreme
September Weather	29°C (84°F)	1 mm (0.0 inches)	71%	extreme
October Weather	30°C (85°F)	2 mm (0.1 inches)	70%	extreme
November Weather	30°C (86°F)	2 mm (0.1 inches)	71%	extreme
December Weather	30°C (86°F)	12 mm (0.5 inches)	76%	extreme