September Weather in Porteirinha, Brazil

Last updated: August 22, 2025

In Porteirinha, Brazil, the average temperature in September hovers around 26°C (78°F), creating a warm and inviting atmosphere. Expect minimum temperatures to dip to 14°C (57°F), while highs can soar up to 39°C (102°F). With a mere 3 mm (0.1 in) of precipitation over 0 days, the month remains predominantly dry, complemented by an average humidity of 54%. Perfect for exploring all that this vibrant location has to offer!

September Temperature in Porteirinha

In September in Porteirinha, the average temperature is 26°C (78°F). Maximum temperatures can reach 39°C (102°F), while minimums may drop to as low as 14°C (57°F). Therefore, it's wise to pack for both warm days and cooler evenings when traveling to Porteirinha this month.

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

The chart illustrates September temperature patterns in Porteirinha, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porteirinha, September typically has an average temperature of 26°C (78°F), with highs reaching up to 39°C (102°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in Porteirinha

In Porteirinha in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Porteirinha

The chart displays monthly precipitation patterns in Porteirinha, 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 Porteirinha, September typically receives around 3 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 Porteirinha

In Porteirinha in September humidity is 54%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making it ideal for leisurely exploration but slightly sticky when engaging in outdoor activities.

September Average Humidity in Porteirinha

This chart illustrates the average monthly humidity levels in Porteirinha, 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 Porteirinha is approximately 54%, 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 Porteirinha

In Porteirinha 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 Porteirinha.

Maximum UV Index Levels in Porteirinha for September

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

Data source: Porteirinha 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 Porteirinha Compares to Other Months

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

This table compares monthly weather conditions in Porteirinha, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	47 mm (1.9 inches)	75%	extreme
February Weather	25°C (78°F)	118 mm (4.7 inches)	83%	extreme
March Weather	26°C (78°F)	77 mm (3.0 inches)	88%	extreme
April Weather	25°C (77°F)	37 mm (1.4 inches)	81%	extreme
May Weather	23°C (74°F)	7 mm (0.3 inches)	72%	extreme
June Weather	23°C (73°F)	1 mm (0.0 inches)	71%	very high
July Weather	21°C (71°F)	1 mm (0.1 inches)	66%	very high
August Weather	23°C (74°F)	1 mm (0.0 inches)	61%	extreme
September Weather	26°C (78°F)	3 mm (0.1 inches)	54%	extreme
October Weather	27°C (81°F)	45 mm (1.8 inches)	46%	extreme
November Weather	25°C (78°F)	128 mm (5.0 inches)	42%	extreme
December Weather	25°C (78°F)	160 mm (6.3 inches)	51%	extreme