September Weather in Rio Branco do Sul, Brazil

Last updated: August 22, 2025

In September, the average temperature in Rio Branco do Sul, Brazil is a comfortable 18°C (64°F). Expect a range as the minimum can drop to 7°C (44°F), while highs may reach up to 31°C (88°F). During this month, you'll encounter an average of 71 mm (2.8 in) of precipitation over 7 days and enjoy a relative humidity of 73%.

September Temperature in Rio Branco do Sul

In September in Rio Branco do Sul, the average temperature is 18°C (64°F). The maximum can reach 31°C (88°F), and the minimum can be as low as 7°C (44°F). This makes it a great time to explore and enjoy both warm and cooler activities throughout the day.

September Weather in Rio Branco do Sul: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rio Branco do Sul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Branco do Sul, September typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (88°F) and lows dropping to around 7°C (44°F).

Data source: Temperature data for Rio Branco do Sul generated using information from the Copernicus Climate Change Service.

September Precipitation in Rio Branco do Sul

In Rio Branco do Sul in September, the precipitation amount is 71 mm (2.8 in) over a span of 7 days.

September Precipitation Trends in Rio Branco do Sul

The chart displays monthly precipitation patterns in Rio Branco do Sul, 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 Rio Branco do Sul, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 7 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 Rio Branco do Sul

In Rio Branco do Sul in September, humidity is 73%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace that can leave travelers feeling a bit sluggish, making outdoor activities feel more demanding and encouraging frequent breaks to hydrate and cool off.

September Average Humidity in Rio Branco do Sul

This chart illustrates the average monthly humidity levels in Rio Branco do Sul, 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 Rio Branco do Sul is approximately 73%, 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 Rio Branco do Sul

In Rio Branco do Sul in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Rio Branco do Sul.

Maximum UV Index Levels in Rio Branco do Sul for September

The chart shows the monthly maximum UV Index (UVI) for Rio Branco do Sul 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 Rio Branco do Sul typically reaches 11, which falls under the extreme exposure category.

Data source: Rio Branco do Sul 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 Rio Branco do Sul Compares to Other Months

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

This table compares monthly weather conditions in Rio Branco do Sul, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (71°F)	191 mm (7.5 inches)	89%	extreme
February Weather	21°C (70°F)	143 mm (5.6 inches)	86%	extreme
March Weather	21°C (69°F)	119 mm (4.7 inches)	87%	extreme
April Weather	18°C (65°F)	57 mm (2.3 inches)	85%	extreme
May Weather	16°C (61°F)	83 mm (3.3 inches)	84%	very high
June Weather	15°C (59°F)	101 mm (4.0 inches)	83%	high
July Weather	14°C (57°F)	29 mm (1.2 inches)	78%	high
August Weather	15°C (59°F)	73 mm (2.9 inches)	73%	very high
September Weather	18°C (64°F)	71 mm (2.8 inches)	73%	extreme
October Weather	18°C (65°F)	148 mm (5.8 inches)	71%	extreme
November Weather	19°C (66°F)	98 mm (3.8 inches)	83%	extreme
December Weather	20°C (69°F)	153 mm (6.0 inches)	87%	extreme