September Weather in Porto Franco, Brazil

Last updated: August 22, 2025

In September, the average temperature in Porto Franco, Brazil reaches a warm 29°C (85°F), with minimums dropping to 19°C (67°F) and maximums soaring up to 39°C (102°F). Expect a light precipitation of 8 mm (0.3 in) over just 1 day, while the average humidity hovers around a comfortable 30%. Prepare for a blend of warmth and dryness!

September Temperature in Porto Franco

In September in Porto Franco, the average temperature is 29°C (85°F), with maximums reaching 39°C (102°F) and minimums dropping as low as 19°C (67°F). It's a perfect time to explore outdoor activities while staying hydrated and protected from the sun.

September Weather in Porto Franco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Porto Franco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porto Franco, September typically has an average temperature of 29°C (85°F), with highs reaching up to 39°C (102°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Porto Franco

In Porto Franco in September, the precipitation amount is 8 mm (0.3 in) over the course of 1 day.

September Precipitation Trends in Porto Franco

The chart displays monthly precipitation patterns in Porto Franco, 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 Porto Franco, September typically receives around 8 mm (0.3 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 Porto Franco

In Porto Franco in September humidity is 30%. With an average temperature of 29°C (85°F), this humidity feels like a comfortable warm breeze, making it ideal for exploring the attractions and enjoying outdoor activities without feeling stifling or overly sticky.

September Average Humidity in Porto Franco

This chart illustrates the average monthly humidity levels in Porto Franco, 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 Porto Franco is approximately 30%, 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 Porto Franco

In Porto Franco 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 Porto Franco.

Maximum UV Index Levels in Porto Franco for September

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

Data source: Porto Franco 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 Porto Franco Compares to Other Months

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

This table compares monthly weather conditions in Porto Franco, 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)	170 mm (6.7 inches)	89%	extreme
February Weather	26°C (80°F)	252 mm (9.9 inches)	89%	extreme
March Weather	26°C (80°F)	227 mm (8.9 inches)	91%	extreme
April Weather	27°C (81°F)	167 mm (6.6 inches)	92%	extreme
May Weather	27°C (82°F)	50 mm (2.0 inches)	84%	extreme
June Weather	27°C (82°F)	4 mm (0.1 inches)	70%	extreme
July Weather	27°C (82°F)	6 mm (0.2 inches)	43%	extreme
August Weather	28°C (83°F)	2 mm (0.1 inches)	36%	extreme
September Weather	29°C (85°F)	8 mm (0.3 inches)	30%	extreme
October Weather	29°C (84°F)	33 mm (1.3 inches)	29%	extreme
November Weather	27°C (82°F)	133 mm (5.2 inches)	41%	extreme
December Weather	27°C (81°F)	137 mm (5.4 inches)	68%	extreme