September Weather in Monteiro, Brazil

Last updated: August 22, 2025

In September, the average temperature in Monteiro, Brazil is a pleasant 25°C (76°F). Expect basking days with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 35°C (96°F). Not to worry about getting caught in the rain, as the area experiences a meager 3 mm (0.1 in) of precipitation over 0 days. The average humidity hovers around 79%, creating a comfortable tropical feel.

September Temperature in Monteiro

In September in Monteiro, the average temperature is 25°C (76°F). Maximums can reach 35°C (96°F), and minimums can be as low as 16°C (62°F). This makes Monteiro a pleasant destination for travelers seeking warm weather and comfortable conditions.

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

The chart illustrates September temperature patterns in Monteiro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monteiro, September typically has an average temperature of 25°C (76°F), with highs reaching up to 35°C (96°F) and lows dropping to around 16°C (62°F).

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

September Precipitation in Monteiro

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

September Precipitation Trends in Monteiro

The chart displays monthly precipitation patterns in Monteiro, 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 Monteiro, 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 Monteiro

In Monteiro in September humidity is 79%. With an average temperature of 25°C (76°F), this humidity feels like a warm, enveloping blanket that can make traveling feel sticky and exhausting. Staying hydrated and taking breaks in shaded areas become essential to enjoy your journey under such conditions.

September Average Humidity in Monteiro

This chart illustrates the average monthly humidity levels in Monteiro, 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 Monteiro is approximately 79%, 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 Monteiro

In Monteiro 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 Monteiro, you can check here.

Maximum UV Index Levels in Monteiro for September

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

Data source: Monteiro 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 Monteiro Compares to Other Months

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

This table compares monthly weather conditions in Monteiro, 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)	20 mm (0.8 inches)	84%	extreme
February Weather	27°C (80°F)	56 mm (2.2 inches)	87%	extreme
March Weather	26°C (79°F)	99 mm (3.9 inches)	88%	extreme
April Weather	25°C (78°F)	86 mm (3.4 inches)	89%	extreme
May Weather	24°C (76°F)	43 mm (1.7 inches)	90%	extreme
June Weather	23°C (74°F)	19 mm (0.8 inches)	89%	extreme
July Weather	23°C (73°F)	17 mm (0.7 inches)	86%	extreme
August Weather	23°C (74°F)	5 mm (0.2 inches)	84%	extreme
September Weather	25°C (76°F)	3 mm (0.1 inches)	79%	extreme
October Weather	26°C (79°F)	2 mm (0.1 inches)	74%	extreme
November Weather	27°C (80°F)	5 mm (0.2 inches)	71%	extreme
December Weather	27°C (80°F)	10 mm (0.4 inches)	72%	extreme