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September Weather in Barro Alto, Brazil

Last updated: August 22, 2025

In September, the average temperature in Barro Alto, Brazil is a warm 28°C (82°F), with daily fluctuations ranging from a refreshing 17°C (62°F) to a scorching 39°C (102°F). Visitors can expect a light drizzle, with an average precipitation amount of 5 mm (0.2 in) spread over just 1 day. The atmosphere remains comfortably dry, showcasing an average humidity of 34%.

September Temperature in Barro Alto

In September in Barro Alto, the average temperature is 28°C (82°F), with maximums reaching 39°C (102°F) and minimums dropping as low as 17°C (62°F). This weather makes it a great time for travelers seeking warm and pleasant conditions.

September Weather in Barro Alto: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Barro Alto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barro Alto, September typically has an average temperature of 28°C (82°F), with highs reaching up to 39°C (102°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec777677777674737882817777
Data source: Temperature data for Barro Alto 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 Barro Alto

In Barro Alto in September, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

September Precipitation Trends in Barro Alto

The chart displays monthly precipitation patterns in Barro Alto, 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 Barro Alto, September typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec142254164829101593199250
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Barro Alto

In Barro Alto in September, humidity is 34%. With an average temperature of 28°C (82°F), this humidity feels like a pleasant summer day, making it ideal for exploring outdoor attractions and enjoying leisurely strolls without feeling overly sticky or uncomfortable.

September Average Humidity in Barro Alto

This chart illustrates the average monthly humidity levels in Barro Alto, 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 Barro Alto is approximately 34%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%90%90%82%65%59%53%44%34%26%50%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Barro Alto

In Barro Alto 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 Barro Alto.

Maximum UV Index Levels in Barro Alto for September

The chart shows the monthly maximum UV Index (UVI) for Barro Alto 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 Barro Alto typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16151413119101213151516
Data source: Barro Alto 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 Barro Alto Compares to Other Months

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

This table compares monthly weather conditions in Barro Alto, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)142 mm (5.6 inches)86%extreme
February Weather24°C (76°F)254 mm (10.0 inches)89%extreme
March Weather25°C (77°F)164 mm (6.5 inches)90%extreme
April Weather25°C (77°F)82 mm (3.2 inches)82%extreme
May Weather24°C (76°F)9 mm (0.4 inches)65%extreme
June Weather23°C (74°F)1 mm (0.0 inches)59%very high
July Weather23°C (73°F)0 mm (0.0 inches)53%very high
August Weather25°C (78°F)1 mm (0.1 inches)44%extreme
September Weather28°C (82°F)5 mm (0.2 inches)34%extreme
October Weather27°C (82°F)93 mm (3.7 inches)26%extreme
November Weather25°C (77°F)199 mm (7.8 inches)50%extreme
December Weather25°C (77°F)250 mm (9.9 inches)70%extreme

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