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September Weather in Rio Formoso, Brazil

Last updated: August 22, 2025

In September, the average temperature in Rio Formoso, Brazil is a pleasant 25°C (77°F). You can expect minimum temperatures dipping to 19°C (67°F) and maximizing at 31°C (89°F). During this time, the region sees an average precipitation of 60 mm (2.4 in) over approximately 21 days, coupled with a high average humidity of 79%. Be prepared for a mix of warm days and occasional rain!

September Temperature in Rio Formoso

In September in Rio Formoso, the average temperature is 25°C (77°F). The maximum can reach 31°C (89°F) and the minimum can be as low as 19°C (67°F). This pleasant climate makes Rio Formoso an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Rio Formoso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Formoso, September typically has an average temperature of 25°C (77°F), with highs reaching up to 31°C (89°F) and lows dropping to around 19°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181807876757576788080
Data source: Temperature data for Rio Formoso 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 Formoso

In Rio Formoso in September, the precipitation amount is 60 mm (2.4 in) over a span of 21 days.

September Precipitation Trends in Rio Formoso

The chart displays monthly precipitation patterns in Rio Formoso, 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 Formoso, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec53671121141321501299160434546
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Formoso

In Rio Formoso in September, humidity is 79%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sluggish but pleasantly tropical.

September Average Humidity in Rio Formoso

This chart illustrates the average monthly humidity levels in Rio Formoso, 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 Formoso is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%87%88%89%90%89%86%84%79%74%71%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Formoso

In Rio Formoso 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 Rio Formoso.

Maximum UV Index Levels in Rio Formoso for September

The chart shows the monthly maximum UV Index (UVI) for Rio Formoso 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 Formoso typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141414141211111213131414
Data source: Rio Formoso 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 Formoso Compares to Other Months

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

This table compares monthly weather conditions in Rio Formoso, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)53 mm (2.1 inches)84%extreme
February Weather27°C (81°F)67 mm (2.6 inches)87%extreme
March Weather27°C (81°F)112 mm (4.4 inches)88%extreme
April Weather26°C (80°F)114 mm (4.5 inches)89%extreme
May Weather26°C (78°F)132 mm (5.2 inches)90%extreme
June Weather25°C (77°F)150 mm (5.9 inches)89%extreme
July Weather24°C (75°F)129 mm (5.1 inches)86%extreme
August Weather24°C (75°F)91 mm (3.6 inches)84%extreme
September Weather25°C (77°F)60 mm (2.4 inches)79%extreme
October Weather26°C (79°F)43 mm (1.7 inches)74%extreme
November Weather27°C (80°F)45 mm (1.8 inches)71%extreme
December Weather27°C (81°F)46 mm (1.8 inches)72%extreme

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