September Weather in Riachao, Brazil

Last updated: August 22, 2025

In Riachao, Brazil, the average temperature in September is a warm 29°C (85°F). Expect to experience a minimum of 21°C (69°F) and a peak of 38°C (101°F). Precipitation is limited, with only 6 mm (0.2 in) expected over the course of 1 day. The average humidity sits at a comfortable 41%, making it a pleasant time to be outdoors.

September Temperature in Riachao

In September in Riachao, the average temperature is 29°C (85°F). Maximums can reach 38°C (101°F) and minimums can be as low as 21°C (69°F). It's a great time to visit for those who enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Riachao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riachao, September typically has an average temperature of 29°C (85°F), with highs reaching up to 38°C (101°F) and lows dropping to around 21°C (69°F).

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

September Precipitation in Riachao

In Riachao in September, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

September Precipitation Trends in Riachao

The chart displays monthly precipitation patterns in Riachao, 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 Riachao, September typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 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 Riachao

In Riachao in September, humidity is 41%. With an average temperature of 29°C (85°F), this humidity feels like a warm embrace, making it comfortable for exploring and enjoying outdoor adventures while still allowing for refreshing breaks in shaded areas.

September Average Humidity in Riachao

This chart illustrates the average monthly humidity levels in Riachao, 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 Riachao is approximately 41%, 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 Riachao

In Riachao 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 Riachao.

Maximum UV Index Levels in Riachao for September

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

Data source: Riachao 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 Riachao Compares to Other Months

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

This table compares monthly weather conditions in Riachao, 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 (78°F)	186 mm (7.3 inches)	90%	extreme
February Weather	25°C (78°F)	309 mm (12.2 inches)	91%	extreme
March Weather	26°C (78°F)	272 mm (10.7 inches)	93%	extreme
April Weather	26°C (79°F)	180 mm (7.1 inches)	92%	extreme
May Weather	27°C (81°F)	34 mm (1.4 inches)	86%	extreme
June Weather	27°C (80°F)	3 mm (0.1 inches)	76%	extreme
July Weather	27°C (80°F)	3 mm (0.1 inches)	61%	extreme
August Weather	28°C (83°F)	3 mm (0.1 inches)	50%	extreme
September Weather	29°C (85°F)	6 mm (0.2 inches)	41%	extreme
October Weather	28°C (83°F)	62 mm (2.4 inches)	37%	extreme
November Weather	26°C (80°F)	176 mm (6.9 inches)	48%	extreme
December Weather	26°C (79°F)	204 mm (8.0 inches)	76%	extreme