September Weather in Tres Rios, Brazil

Last updated: August 22, 2025

In September, the average temperature in Tres Rios, Brazil hovers around 22°C (71°F), offering a delightful climate. However, be prepared for a range, with minimum temperatures dropping to 10°C (50°F) and maximums soaring to 35°C (96°F). During this month, expect 45 mm (1.8 in) of precipitation over approximately 6 days, contributing to an average humidity level of 68%.

September Temperature in Tres Rios

In September in Tres Rios, the average temperature is 22°C (71°F). Maximums can reach 35°C (96°F), while minimums can be as low as 10°C (50°F). It's a great time to enjoy the pleasant weather while exploring the sights and experiences Tres Rios has to offer.

September Weather in Tres Rios: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Tres Rios, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tres Rios, September typically has an average temperature of 22°C (71°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Tres Rios

In Tres Rios in September, the precipitation amount is 45 mm (1.8 in) over the course of 6 days.

September Precipitation Trends in Tres Rios

The chart displays monthly precipitation patterns in Tres Rios, 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 Tres Rios, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 6 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 Tres Rios

In Tres Rios in September, humidity is 68%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making traveling quite pleasant yet slightly sticky as you explore the sights.

September Average Humidity in Tres Rios

This chart illustrates the average monthly humidity levels in Tres Rios, 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 Tres Rios is approximately 68%, 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 Tres Rios

In Tres Rios 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 Tres Rios.

Maximum UV Index Levels in Tres Rios for September

The chart shows the monthly maximum UV Index (UVI) for Tres Rios 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 Tres Rios typically reaches 12, which falls under the extreme exposure category.

Data source: Tres Rios 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 Tres Rios Compares to Other Months

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

This table compares monthly weather conditions in Tres Rios, 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 (77°F)	120 mm (4.7 inches)	85%	extreme
February Weather	24°C (75°F)	211 mm (8.3 inches)	85%	extreme
March Weather	24°C (75°F)	143 mm (5.6 inches)	86%	extreme
April Weather	22°C (72°F)	48 mm (1.9 inches)	83%	extreme
May Weather	20°C (68°F)	36 mm (1.4 inches)	81%	very high
June Weather	19°C (67°F)	19 mm (0.7 inches)	80%	high
July Weather	18°C (64°F)	11 mm (0.4 inches)	76%	very high
August Weather	18°C (66°F)	37 mm (1.4 inches)	73%	very high
September Weather	22°C (71°F)	45 mm (1.8 inches)	68%	extreme
October Weather	22°C (72°F)	107 mm (4.2 inches)	61%	extreme
November Weather	22°C (72°F)	203 mm (8.0 inches)	72%	extreme
December Weather	23°C (74°F)	202 mm (7.9 inches)	75%	extreme