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September Weather in Castro Alves, Brazil

Last updated: August 22, 2025

In September, the average temperature in Castro Alves, Brazil hovers around 23°C (74°F). Conditions can vary widely, with minimums dropping to 15°C (60°F) and maximums soaring up to 35°C (95°F). Expect precipitation of approximately 40 mm (1.6 in) over a span of 14 days, while average humidity sits at a humid 75%.

September Temperature in Castro Alves

In September in Castro Alves, the average temperature is 23°C (74°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as 15°C (60°F). This pleasant climate makes Castro Alves an ideal destination for outdoor activities and exploration during this time of year.

September Weather in Castro Alves: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castro Alves, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro Alves, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec798079787573727274777778
Data source: Temperature data for Castro Alves 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 Castro Alves

In Castro Alves in September, the precipitation amount is 40 mm (1.6 in) over a span of 14 days.

September Precipitation Trends in Castro Alves

The chart displays monthly precipitation patterns in Castro Alves, 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 Castro Alves, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec364667704643444140326777
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Castro Alves

In Castro Alves in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Castro Alves

This chart illustrates the average monthly humidity levels in Castro Alves, 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 Castro Alves is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%81%86%87%86%84%80%77%75%72%71%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Castro Alves

In Castro Alves 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 Castro Alves.

Maximum UV Index Levels in Castro Alves for September

The chart shows the monthly maximum UV Index (UVI) for Castro Alves 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 Castro Alves typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141413119101213151514
Data source: Castro Alves 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 Castro Alves Compares to Other Months

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

This table compares monthly weather conditions in Castro Alves, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)36 mm (1.4 inches)76%extreme
February Weather27°C (80°F)46 mm (1.8 inches)81%extreme
March Weather26°C (79°F)67 mm (2.7 inches)86%extreme
April Weather25°C (78°F)69 mm (2.7 inches)87%extreme
May Weather24°C (76°F)46 mm (1.8 inches)86%extreme
June Weather23°C (74°F)43 mm (1.7 inches)84%very high
July Weather22°C (72°F)44 mm (1.7 inches)80%very high
August Weather22°C (72°F)40 mm (1.6 inches)77%extreme
September Weather23°C (74°F)40 mm (1.6 inches)75%extreme
October Weather25°C (77°F)32 mm (1.3 inches)72%extreme
November Weather25°C (78°F)67 mm (2.6 inches)71%extreme
December Weather26°C (78°F)77 mm (3.0 inches)70%extreme

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