September Weather in Uniao, Brazil

Last updated: August 22, 2025

In Uniao, Brazil, the average temperature in September hovers around 30°C (87°F). Expect a minimum of 20°C (69°F) and occasional peaks reaching up to 39°C (102°F). With just 2 mm (0.1 in) of precipitation over 0 days, the weather is typically dry, complemented by an average humidity of only 36%. Perfect for those who enjoy warm, sunny days!

September Temperature in Uniao

In September in Uniao, the average temperature is 30°C (87°F). Maximums can reach 39°C (102°F), and minimums can be as low as 20°C (69°F). Be sure to pack light, breathable clothing and stay hydrated while exploring the warm climate!

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

The chart illustrates September temperature patterns in Uniao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Uniao, September typically has an average temperature of 30°C (87°F), with highs reaching up to 39°C (102°F) and lows dropping to around 20°C (69°F).

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

September Precipitation in Uniao

In Uniao in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Uniao

The chart displays monthly precipitation patterns in Uniao, 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 Uniao, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 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 Uniao

In Uniao in September, humidity is 36%. With an average temperature of 30°C (87°F), this humidity feels like a warm embrace, making it quite pleasant for traveling, as you can enjoy outdoor activities without feeling overly sticky or uncomfortable.

September Average Humidity in Uniao

This chart illustrates the average monthly humidity levels in Uniao, 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 Uniao is approximately 36%, 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 Uniao

In Uniao 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 Uniao.

Maximum UV Index Levels in Uniao for September

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

Data source: Uniao 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 Uniao Compares to Other Months

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

This table compares monthly weather conditions in Uniao, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	201 mm (7.9 inches)	90%	extreme
February Weather	27°C (80°F)	325 mm (12.8 inches)	91%	extreme
March Weather	27°C (80°F)	385 mm (15.1 inches)	92%	extreme
April Weather	27°C (81°F)	301 mm (11.8 inches)	93%	extreme
May Weather	27°C (81°F)	109 mm (4.3 inches)	88%	extreme
June Weather	28°C (82°F)	15 mm (0.6 inches)	75%	extreme
July Weather	28°C (83°F)	17 mm (0.7 inches)	52%	extreme
August Weather	29°C (84°F)	3 mm (0.1 inches)	42%	extreme
September Weather	30°C (87°F)	2 mm (0.1 inches)	36%	extreme
October Weather	31°C (88°F)	5 mm (0.2 inches)	35%	extreme
November Weather	30°C (86°F)	48 mm (1.9 inches)	43%	extreme
December Weather	29°C (85°F)	87 mm (3.4 inches)	76%	extreme