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September Weather in Rio Negrinho, Brazil

Last updated: August 22, 2025

In Rio Negrinho, Brazil, the average temperature in September is a pleasant 17°C (63°F), with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 31°C (88°F). Visitors can expect an average humidity of 82%, along with 95 mm (3.7 in) of precipitation spread over 9 days. Whether you're enjoying the warmth or preparing for a sprinkle, this month offers a comfortable climate for exploring!

September Temperature in Rio Negrinho

In September in Rio Negrinho, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 31°C (88°F), while the minimum can drop as low as 5°C (41°F). This variety in weather makes it advisable for travelers to pack layers to accommodate both warm days and cooler nights.

September Weather in Rio Negrinho: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rio Negrinho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Negrinho, September typically has an average temperature of 17°C (63°F), with highs reaching up to 31°C (88°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec706968645958565763636568
Data source: Temperature data for Rio Negrinho 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 Rio Negrinho

In Rio Negrinho in September, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.

September Precipitation Trends in Rio Negrinho

The chart displays monthly precipitation patterns in Rio Negrinho, 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 Rio Negrinho, September typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1811471446699127418495176127186
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Negrinho

In Rio Negrinho in September, humidity is 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

September Average Humidity in Rio Negrinho

This chart illustrates the average monthly humidity levels in Rio Negrinho, 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 Rio Negrinho is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%83%85%85%86%85%80%79%82%82%86%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Negrinho

In Rio Negrinho in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Rio Negrinho.

Maximum UV Index Levels in Rio Negrinho for September

The chart shows the monthly maximum UV Index (UVI) for Rio Negrinho 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 Rio Negrinho typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15151311766811131515
Data source: Rio Negrinho 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 Rio Negrinho Compares to Other Months

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

This table compares monthly weather conditions in Rio Negrinho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)180 mm (7.1 inches)86%extreme
February Weather20°C (69°F)147 mm (5.8 inches)83%extreme
March Weather20°C (68°F)144 mm (5.7 inches)85%extreme
April Weather18°C (64°F)66 mm (2.6 inches)85%extreme
May Weather15°C (60°F)99 mm (3.9 inches)86%high
June Weather14°C (58°F)127 mm (5.0 inches)85%high
July Weather13°C (56°F)41 mm (1.6 inches)80%high
August Weather14°C (57°F)84 mm (3.3 inches)79%very high
September Weather17°C (63°F)95 mm (3.7 inches)82%extreme
October Weather17°C (63°F)176 mm (6.9 inches)82%extreme
November Weather18°C (65°F)127 mm (5.0 inches)86%extreme
December Weather20°C (68°F)186 mm (7.3 inches)88%extreme

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