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September Weather in Sao Mateus, Brazil

Last updated: August 22, 2025

In Sao Mateus, Brazil during September, the average temperature hovers around 24°C (75°F), with a comfortable range from a minimum of 20°C (67°F) to a maximum of 28°C (83°F). Expect 60 mm (2.4 in) of precipitation spread over approximately 12 days, contributing to an average humidity of 77%.

September Temperature in Sao Mateus

In September in Sao Mateus, the average temperature is 24°C (75°F). The maximum can reach 28°C (83°F) and the minimum can be as low as 20°C (67°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Sao Mateus, 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, September typically has an average temperature of 24°C (75°F), with highs reaching up to 28°C (83°F) and lows dropping to around 20°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec797979787674727274767778
Data source: Temperature data for Sao Mateus generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sao Mateus

In Sao Mateus in September, the precipitation amount is 60 mm (2.4 in) over a span of 12 days.

September Precipitation Trends in Sao Mateus

The chart displays monthly precipitation patterns in Sao Mateus, 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, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec74115112998153486460135180246
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sao Mateus

In Sao Mateus in September humidity is 77%. With an average temperature of 24°C (75°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling and may require frequent breaks to stay hydrated while exploring.

September Average Humidity in Sao Mateus

This chart illustrates the average monthly humidity levels in Sao Mateus, 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 is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%82%82%81%79%76%77%77%78%78%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sao Mateus

In Sao Mateus in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Sao Mateus.

Maximum UV Index Levels in Sao Mateus for September

The chart shows the monthly maximum UV Index (UVI) for Sao Mateus 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 typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151513129781012141515
Data source: Sao Mateus 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 Compares to Other Months

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

This table compares monthly weather conditions in Sao Mateus, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)74 mm (2.9 inches)81%extreme
February Weather26°C (80°F)115 mm (4.5 inches)82%extreme
March Weather26°C (80°F)112 mm (4.4 inches)82%extreme
April Weather25°C (78°F)99 mm (3.9 inches)81%extreme
May Weather24°C (76°F)81 mm (3.2 inches)79%very high
June Weather23°C (74°F)53 mm (2.1 inches)76%high
July Weather22°C (73°F)48 mm (1.9 inches)77%very high
August Weather22°C (73°F)64 mm (2.5 inches)77%very high
September Weather24°C (75°F)60 mm (2.4 inches)77%extreme
October Weather25°C (77°F)135 mm (5.3 inches)78%extreme
November Weather25°C (77°F)179 mm (7.1 inches)80%extreme
December Weather26°C (78°F)246 mm (9.7 inches)80%extreme

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