September Weather in Formosa, Brazil

Last updated: August 22, 2025

In September, the average temperature in Formosa, Brazil is a pleasant 25°C (77°F). Visitors can expect a range of temperatures, with a minimum of 14°C (57°F) and a maximum reaching 37°C (98°F). Additionally, the region may receive approximately 5 mm (0.2 in) of precipitation over the course of 1 day. With an average humidity of 38%, it’s the perfect time to enjoy the outdoors!

September Temperature in Formosa

In September in Formosa, the average temperature is 25°C (77°F). Maximums can reach 37°C (98°F) and minimums can be as low as 14°C (57°F). This pleasant climate makes Formosa an ideal destination for travel during this time of the year.

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

The chart illustrates September temperature patterns in Formosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Formosa, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (98°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in Formosa

In Formosa in September, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

September Precipitation Trends in Formosa

The chart displays monthly precipitation patterns in Formosa, 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 Formosa, September typically receives around 5 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.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Formosa

In Formosa in September, humidity is 38%. With an average temperature of 25°C (77°F), this humidity feels like a comfortable, refreshing embrace, making it ideal for exploring sights, enjoying outdoor activities, and savoring local cuisine without feeling overly sticky or fatigued.

September Average Humidity in Formosa

This chart illustrates the average monthly humidity levels in Formosa, 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 Formosa is approximately 38%, 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 Formosa

In Formosa in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Formosa, you can check here.

Maximum UV Index Levels in Formosa for September

The chart shows the monthly maximum UV Index (UVI) for Formosa 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 Formosa typically reaches 14, which falls under the extreme exposure category.

Data source: Formosa 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 Formosa Compares to Other Months

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

This table compares monthly weather conditions in Formosa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	98 mm (3.8 inches)	83%	extreme
February Weather	23°C (74°F)	216 mm (8.5 inches)	88%	extreme
March Weather	24°C (75°F)	175 mm (6.9 inches)	90%	extreme
April Weather	23°C (74°F)	78 mm (3.1 inches)	80%	extreme
May Weather	22°C (72°F)	17 mm (0.7 inches)	62%	extreme
June Weather	21°C (70°F)	1 mm (0.0 inches)	54%	very high
July Weather	20°C (69°F)	0 mm (0.0 inches)	50%	very high
August Weather	23°C (73°F)	4 mm (0.1 inches)	45%	extreme
September Weather	25°C (77°F)	5 mm (0.2 inches)	38%	extreme
October Weather	26°C (79°F)	71 mm (2.8 inches)	29%	extreme
November Weather	24°C (75°F)	174 mm (6.8 inches)	39%	extreme
December Weather	24°C (75°F)	250 mm (9.8 inches)	54%	extreme