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September Weather in Sao Carlos, Brazil

Last updated: August 22, 2025

In September, the average temperature in Sao Carlos, Brazil hovers around 24°C (75°F). While you might enjoy some warm days, be prepared for a range: temperatures can dip as low as 9°C (49°F) and soar up to 38°C (100°F). With 33 mm (1.3 in) of precipitation spread over 5 days, don't forget your umbrella! The average humidity sits at a comfortable 54%, making it a pleasant time to explore.

September Temperature in Sao Carlos

In September, in Sao Carlos, the average temperature is 24°C (75°F). Maximum temperatures can reach 38°C (100°F), while minimums can drop as low as 9°C (49°F). Be prepared for a comfortable climate with warm days and cooler nights, making it an ideal time for outdoor adventures.

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

The chart illustrates September temperature patterns in Sao Carlos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Carlos, September typically has an average temperature of 24°C (75°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec757575726867666875757475
Data source: Temperature data for Sao Carlos 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 Carlos

In Sao Carlos in September, the precipitation amount is 33 mm (1.3 in) over the course of 5 days.

September Precipitation Trends in Sao Carlos

The chart displays monthly precipitation patterns in Sao Carlos, 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 Carlos, September typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec1801569950361493133107134169
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sao Carlos

In Sao Carlos in September humidity is 54%. With average temperature 24°C (75°F), this humidity feels like a refreshing breeze that enhances the comfort of traveling, allowing for enjoyable outdoor exploration without the discomfort often associated with higher humidity levels.

September Average Humidity in Sao Carlos

This chart illustrates the average monthly humidity levels in Sao Carlos, 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 Carlos is approximately 54%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%86%82%76%71%68%59%54%50%74%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sao Carlos

In Sao Carlos 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 Carlos.

Maximum UV Index Levels in Sao Carlos for September

The chart shows the monthly maximum UV Index (UVI) for Sao Carlos 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 Carlos typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151613118781012131416
Data source: Sao Carlos 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 Carlos Compares to Other Months

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

This table compares monthly weather conditions in Sao Carlos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)180 mm (7.1 inches)88%extreme
February Weather24°C (76°F)156 mm (6.1 inches)87%extreme
March Weather24°C (76°F)99 mm (3.9 inches)86%extreme
April Weather22°C (73°F)50 mm (2.0 inches)82%extreme
May Weather20°C (68°F)36 mm (1.4 inches)76%very high
June Weather20°C (68°F)14 mm (0.5 inches)71%high
July Weather19°C (66°F)9 mm (0.3 inches)67%very high
August Weather20°C (68°F)31 mm (1.2 inches)59%very high
September Weather24°C (75°F)33 mm (1.3 inches)54%extreme
October Weather24°C (75°F)107 mm (4.2 inches)50%extreme
November Weather23°C (74°F)134 mm (5.3 inches)74%extreme
December Weather24°C (75°F)169 mm (6.6 inches)83%extreme

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