September Weather in Sao Mateus do Maranhao, Brazil

Last updated: August 22, 2025

In Sao Mateus do Maranhao, Brazil, the average temperature in September reaches a warm 30°C (86°F). Expect minimums around 22°C (71°F) and maximums soaring to 37°C (100°F). With an average humidity of just 36%, the atmosphere remains comfortably dry. Interestingly, precipitation is minimal, averaging only 6 mm (0.2 in) throughout the month with rain occurring on 0 days.

September Temperature in Sao Mateus do Maranhao

In September in Sao Mateus do Maranhao, the average temperature is 30°C (86°F). Maximums can reach 37°C (100°F), and minimums can be as low as 22°C (71°F). Be prepared for warm weather, ideal for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Sao Mateus do Maranhao, 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 Maranhao, September typically has an average temperature of 30°C (86°F), with highs reaching up to 37°C (100°F) and lows dropping to around 22°C (71°F).

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

September Precipitation in Sao Mateus do Maranhao

In Sao Mateus do Maranhao in September, the total precipitation amount is 6 mm (0.2 in), spread over a duration of 0 days.

September Precipitation Trends in Sao Mateus do Maranhao

The chart displays monthly precipitation patterns in Sao Mateus do Maranhao, 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 Maranhao, September typically receives around 6 mm (0.2 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 Sao Mateus do Maranhao

In Sao Mateus do Maranhao in September humidity is 36%. With an average temperature of 30°C (86°F), this humidity feels like a warm and comfortable embrace, making it enjoyable for exploring the local sights and indulging in outdoor activities.

September Average Humidity in Sao Mateus do Maranhao

This chart illustrates the average monthly humidity levels in Sao Mateus do Maranhao, 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 Maranhao is approximately 36%, 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 Maranhao

In Sao Mateus do Maranhao 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 Sao Mateus do Maranhao.

Maximum UV Index Levels in Sao Mateus do Maranhao for September

The chart shows the monthly maximum UV Index (UVI) for Sao Mateus do Maranhao 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 Maranhao typically reaches 13, which falls under the extreme exposure category.

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

Weather in Sao Mateus do Maranhao 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 Maranhao, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sao Mateus do Maranhao, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	243 mm (9.6 inches)	90%	extreme
February Weather	27°C (81°F)	290 mm (11.4 inches)	91%	extreme
March Weather	27°C (80°F)	365 mm (14.4 inches)	92%	extreme
April Weather	27°C (81°F)	279 mm (11.0 inches)	93%	extreme
May Weather	27°C (82°F)	110 mm (4.3 inches)	88%	extreme
June Weather	28°C (82°F)	29 mm (1.1 inches)	75%	extreme
July Weather	28°C (82°F)	17 mm (0.7 inches)	52%	extreme
August Weather	29°C (84°F)	6 mm (0.2 inches)	42%	extreme
September Weather	30°C (86°F)	6 mm (0.2 inches)	36%	extreme
October Weather	30°C (86°F)	20 mm (0.8 inches)	35%	extreme
November Weather	29°C (85°F)	77 mm (3.1 inches)	43%	extreme
December Weather	28°C (84°F)	111 mm (4.4 inches)	76%	extreme