September Weather in Sao Mateus do Sul, Brazil

Last updated: August 22, 2025

The average temperature in Sao Mateus do Sul, Brazil for September is a pleasant 19°C (66°F). However, temperatures can range from a cool 5°C (41°F) to a sizzling 32°C (91°F). During this month, expect about 71 mm (2.8 in) of precipitation over 8 days, and the air will feel moderately humid with an average humidity level of 58%.

September Temperature in Sao Mateus do Sul

In September, in Sao Mateus do Sul, the average temperature is 19°C (66°F). Maximums can reach 32°C (91°F), while minimums can drop to as low as 5°C (41°F). Therefore, it's advisable to pack layers to accommodate both warm days and cooler evenings while traveling.

September Weather in Sao Mateus do Sul: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sao Mateus do Sul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Mateus do Sul, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (91°F) and lows dropping to around 5°C (41°F).

Data source: Temperature data for Sao Mateus do Sul generated using information from the Copernicus Climate Change Service.

September Precipitation in Sao Mateus do Sul

In Sao Mateus do Sul in September, the precipitation amount is 71 mm (2.8 in) over the course of 8 days.

September Precipitation Trends in Sao Mateus do Sul

The chart displays monthly precipitation patterns in Sao Mateus do Sul, 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 Sao Mateus do Sul, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 8 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 Sao Mateus do Sul

In Sao Mateus do Sul in September, humidity is 58%. With an average temperature of 19°C (66°F), this humidity feels like a mild embrace, creating a pleasantly warm atmosphere that's perfect for leisurely strolls and sightseeing adventures.

September Average Humidity in Sao Mateus do Sul

This chart illustrates the average monthly humidity levels in Sao Mateus do Sul, 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 Sao Mateus do Sul is approximately 58%, 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 Sao Mateus do Sul

In Sao Mateus do Sul in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Sao Mateus do Sul.

Maximum UV Index Levels in Sao Mateus do Sul for September

The chart shows the monthly maximum UV Index (UVI) for Sao Mateus do Sul 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 Sao Mateus do Sul typically reaches 11, which falls under the extreme exposure category.

Data source: Sao Mateus do Sul 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 Sao Mateus do Sul Compares to Other Months

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

This table compares monthly weather conditions in Sao Mateus do Sul, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	22°C (72°F)	136 mm (5.3 inches)	85%	extreme
February Weather	22°C (71°F)	120 mm (4.7 inches)	80%	extreme
March Weather	21°C (70°F)	102 mm (4.0 inches)	80%	extreme
April Weather	19°C (66°F)	50 mm (2.0 inches)	77%	extreme
May Weather	16°C (61°F)	97 mm (3.8 inches)	76%	very high
June Weather	15°C (59°F)	121 mm (4.8 inches)	74%	high
July Weather	14°C (57°F)	22 mm (0.9 inches)	66%	high
August Weather	15°C (59°F)	84 mm (3.3 inches)	57%	very high
September Weather	19°C (66°F)	71 mm (2.8 inches)	58%	extreme
October Weather	19°C (66°F)	152 mm (6.0 inches)	60%	extreme
November Weather	20°C (68°F)	111 mm (4.4 inches)	78%	extreme
December Weather	22°C (71°F)	141 mm (5.6 inches)	86%	extreme