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September Weather in Santo Antonio, Brazil

Last updated: August 22, 2025

In September, the average temperature in Santo Antonio, Brazil hovers around 26°C (78°F), offering a pleasant climate for outdoor activities. Expect a minimum of 20°C (68°F) and a maximum of 33°C (92°F), creating a comfortable range for all. With an average precipitation of 14 mm (0.6 in) spread over 4 days, you may experience a brief shower or two, but the overall average humidity remains a cozy 72%.

September Temperature in Santo Antonio

In September in Santo Antonio, the average temperature is 26°C (78°F). The maximum can reach 33°C (92°F), while the minimum can be as low as 20°C (68°F). This mild and pleasant climate makes Santo Antonio an ideal destination for travelers looking to enjoy warm weather and outdoor activities.

September Weather in Santo Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santo Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Antonio, September typically has an average temperature of 26°C (78°F), with highs reaching up to 33°C (92°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181807977767778808181
Data source: Temperature data for Santo Antonio 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 Santo Antonio

In Santo Antonio in September, the total precipitation amount is 14 mm (0.6 in) spread over a duration of 4 days.

September Precipitation Trends in Santo Antonio

The chart displays monthly precipitation patterns in Santo Antonio, 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 Santo Antonio, September typically receives around 14 mm (0.6 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec3781119937955761414151526
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santo Antonio

In Santo Antonio in September, humidity is 72%. With an average temperature of 26°C (78°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it essential to stay hydrated and take breaks in the shade.

September Average Humidity in Santo Antonio

This chart illustrates the average monthly humidity levels in Santo Antonio, 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 Santo Antonio is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%89%90%89%90%86%80%77%72%68%66%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santo Antonio

In Santo Antonio 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 Santo Antonio.

Maximum UV Index Levels in Santo Antonio for September

The chart shows the monthly maximum UV Index (UVI) for Santo Antonio 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 Santo Antonio typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141415141311111213131414
Data source: Santo Antonio 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 Santo Antonio Compares to Other Months

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

This table compares monthly weather conditions in Santo Antonio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)37 mm (1.5 inches)86%extreme
February Weather27°C (81°F)81 mm (3.2 inches)89%extreme
March Weather27°C (81°F)119 mm (4.7 inches)89%extreme
April Weather27°C (80°F)93 mm (3.7 inches)89%extreme
May Weather26°C (79°F)79 mm (3.1 inches)90%extreme
June Weather25°C (78°F)55 mm (2.2 inches)86%extreme
July Weather24°C (76°F)76 mm (3.0 inches)80%extreme
August Weather25°C (77°F)14 mm (0.6 inches)77%extreme
September Weather26°C (78°F)14 mm (0.6 inches)72%extreme
October Weather27°C (80°F)15 mm (0.6 inches)68%extreme
November Weather27°C (81°F)15 mm (0.6 inches)66%extreme
December Weather27°C (82°F)26 mm (1.0 inches)70%extreme

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