September Weather in Rio Grande, Brazil

Last updated: August 22, 2025

The average temperature in Rio Grande, Brazil during September is 16°C (61°F), with a delightful range that sees minimums of 9°C (49°F) and maximums of 23°C (74°F). Expect a precipitation amount of 144 mm (5.7 in) over approximately 12 days, contributing to an average humidity of 84%.

September Temperature in Rio Grande

In September in Rio Grande, the average temperature is 16°C (61°F), with maximums capable of reaching 23°C (74°F) and minimums dipping as low as 9°C (49°F). This mild climate makes it an ideal time for travelers to explore the sights comfortably.

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

The chart illustrates September temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, September typically has an average temperature of 16°C (61°F), with highs reaching up to 23°C (74°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Rio Grande

In Rio Grande in September, the precipitation amount is 144 mm (5.7 in) over the course of 12 days.

September Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Grande, September typically receives around 144 mm (5.7 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 Grande

In Rio Grande in September, humidity is 84%. With an average temperature of 16°C (61°F), this humidity feels like a blanket of warmth, making travel slightly sticky but overall comfortable, as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Grande is approximately 84%, 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 Grande

In Rio Grande in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Rio Grande.

Maximum UV Index Levels in Rio Grande for September

The chart shows the monthly maximum UV Index (UVI) for Rio Grande 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 Grande typically reaches 9, which falls under the very high exposure category.

Data source: Rio Grande 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 Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	85 mm (3.3 inches)	79%	extreme
February Weather	24°C (75°F)	75 mm (2.9 inches)	81%	extreme
March Weather	23°C (73°F)	87 mm (3.4 inches)	81%	extreme
April Weather	21°C (70°F)	65 mm (2.6 inches)	80%	very high
May Weather	18°C (64°F)	97 mm (3.8 inches)	82%	moderate
June Weather	15°C (60°F)	99 mm (3.9 inches)	81%	moderate
July Weather	14°C (57°F)	111 mm (4.4 inches)	78%	moderate
August Weather	14°C (58°F)	100 mm (3.9 inches)	80%	high
September Weather	16°C (61°F)	144 mm (5.7 inches)	84%	very high
October Weather	18°C (65°F)	131 mm (5.2 inches)	84%	extreme
November Weather	20°C (68°F)	78 mm (3.1 inches)	82%	extreme
December Weather	22°C (71°F)	77 mm (3.0 inches)	82%	extreme