September Weather in Rio do Sul, Brazil

Last updated: August 22, 2025

In September, the average temperature in Rio do Sul, Brazil hovers around 18°C (64°F). Expect a minimum chill of 4°C (40°F) and a warm maximum of 33°C (92°F). With an average precipitation of 100 mm (4.0 in) spread over 12 days, humidity levels soar to a sultry 82%. Embrace the various weather experiences this month brings!

September Temperature in Rio do Sul

In September in Rio do Sul, the average temperature is 18°C (64°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 4°C (40°F). This makes it an ideal time for travelers seeking a pleasant climate while enjoying outdoor activities.

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

The chart illustrates September temperature patterns in Rio 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 do Sul, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Rio do Sul

In Rio do Sul in September, the precipitation amount is 100 mm (4.0 in) spread over a period of 12 days.

September Precipitation Trends in Rio do Sul

The chart displays monthly precipitation patterns in Rio 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 do Sul, September typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 12 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 do Sul

In Rio do Sul in September humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

September Average Humidity in Rio do Sul

This chart illustrates the average monthly humidity levels in Rio 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 do Sul is approximately 82%, 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 do Sul

In Rio 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 do Sul.

Maximum UV Index Levels in Rio do Sul for September

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

Data source: Rio 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 do Sul Compares to Other Months

Weather in Rio 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 do Sul, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rio 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	23°C (74°F)	155 mm (6.1 inches)	86%	extreme
February Weather	22°C (73°F)	130 mm (5.1 inches)	83%	extreme
March Weather	22°C (71°F)	109 mm (4.3 inches)	85%	extreme
April Weather	19°C (66°F)	69 mm (2.7 inches)	85%	very high
May Weather	16°C (61°F)	101 mm (4.0 inches)	86%	high
June Weather	15°C (59°F)	107 mm (4.2 inches)	85%	moderate
July Weather	13°C (56°F)	50 mm (2.0 inches)	80%	high
August Weather	15°C (58°F)	81 mm (3.2 inches)	79%	very high
September Weather	18°C (64°F)	100 mm (4.0 inches)	82%	extreme
October Weather	19°C (66°F)	134 mm (5.3 inches)	82%	extreme
November Weather	20°C (68°F)	123 mm (4.8 inches)	86%	extreme
December Weather	22°C (72°F)	174 mm (6.8 inches)	88%	extreme