September Weather in Fonte Boa, Brazil

Last updated: August 22, 2025

In September, the average temperature in Fonte Boa, Brazil reaches a warm 27°C (81°F), with daytime highs climbing up to 34°C (94°F) and dropping to a comfortable 23°C (73°F) at night. Expect about 146 mm (5.7 in) of precipitation over 21 days, contributing to an average humidity of 39%. This combination of warmth and moisture creates an inviting atmosphere for outdoor adventures!

September Temperature in Fonte Boa

In September in Fonte Boa, the average temperature is 27°C (81°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 23°C (73°F). This pleasant climate makes it an ideal time for travel, offering warm days perfect for exploring and enjoying outdoor activities.

September Weather in Fonte Boa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fonte Boa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fonte Boa, September typically has an average temperature of 27°C (81°F), with highs reaching up to 34°C (94°F) and lows dropping to around 23°C (73°F).

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

September Precipitation in Fonte Boa

In Fonte Boa in September, the total precipitation amount is 146 mm (5.7 in) spread over 21 days.

September Precipitation Trends in Fonte Boa

The chart displays monthly precipitation patterns in Fonte Boa, 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 Fonte Boa, September typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 21 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 Fonte Boa

In Fonte Boa in September humidity is 39%. With an average temperature of 27°C (81°F), this humidity feels like a pleasant summer's day, making it ideal for exploring outdoor attractions and enjoying leisurely strolls without feeling overly sticky or uncomfortable.

September Average Humidity in Fonte Boa

This chart illustrates the average monthly humidity levels in Fonte Boa, 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 Fonte Boa is approximately 39%, 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 Fonte Boa

In Fonte Boa 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 Fonte Boa.

Maximum UV Index Levels in Fonte Boa for September

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

Data source: Fonte Boa 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 Fonte Boa Compares to Other Months

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

This table compares monthly weather conditions in Fonte Boa, 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)	246 mm (9.7 inches)	84%	extreme
February Weather	27°C (80°F)	260 mm (10.3 inches)	73%	extreme
March Weather	27°C (80°F)	287 mm (11.3 inches)	77%	extreme
April Weather	26°C (80°F)	369 mm (14.5 inches)	85%	extreme
May Weather	26°C (79°F)	421 mm (16.6 inches)	90%	extreme
June Weather	26°C (79°F)	250 mm (9.9 inches)	84%	extreme
July Weather	26°C (79°F)	147 mm (5.8 inches)	74%	extreme
August Weather	27°C (80°F)	122 mm (4.8 inches)	54%	extreme
September Weather	27°C (81°F)	146 mm (5.7 inches)	39%	extreme
October Weather	27°C (81°F)	182 mm (7.2 inches)	36%	extreme
November Weather	27°C (81°F)	251 mm (9.9 inches)	58%	extreme
December Weather	26°C (80°F)	337 mm (13.3 inches)	87%	extreme