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September Weather in Rio Piracicaba, Brazil

Last updated: August 22, 2025

In Rio Piracicaba, Brazil, the average temperature in September hovers around 21°C (70°F), with a minimum dipping to 11°C (52°F) and a maximum soaring to 35°C (95°F). Expect 31 mm (1.2 in) of precipitation spread over about 5 days, complemented by an average humidity of 63%. Whether you're planning outdoor activities or just enjoying the atmosphere, this month offers a delightful blend of warmth and freshness.

September Temperature in Rio Piracicaba

In September in Rio Piracicaba, the average temperature is 21°C (70°F). Maximums can reach 35°C (95°F), and minimums can be as low as 11°C (52°F). It’s a great time to visit for those who enjoy mild to warm weather, but be prepared for both hot days and cooler evenings.

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

The chart illustrates September temperature patterns in Rio Piracicaba, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Piracicaba, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec757373706665636570727173
Data source: Temperature data for Rio Piracicaba 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 Piracicaba

In Rio Piracicaba in September, the precipitation amount is 31 mm (1.2 in) spread over 5 days.

September Precipitation Trends in Rio Piracicaba

The chart displays monthly precipitation patterns in Rio Piracicaba, 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 Piracicaba, September typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec13521916677431172331144208212
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Piracicaba

In Rio Piracicaba in September, humidity is 63%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making it perfect for leisurely exploration but slightly sticky for prolonged outdoor activities.

September Average Humidity in Rio Piracicaba

This chart illustrates the average monthly humidity levels in Rio Piracicaba, 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 Piracicaba is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%85%88%86%82%82%77%72%63%48%61%68%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Piracicaba

In Rio Piracicaba 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 Rio Piracicaba.

Maximum UV Index Levels in Rio Piracicaba for September

The chart shows the monthly maximum UV Index (UVI) for Rio Piracicaba 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 Piracicaba typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171514129781012141516
Data source: Rio Piracicaba 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 Piracicaba Compares to Other Months

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

This table compares monthly weather conditions in Rio Piracicaba, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)135 mm (5.3 inches)83%extreme
February Weather23°C (73°F)219 mm (8.6 inches)85%extreme
March Weather23°C (73°F)166 mm (6.5 inches)87%extreme
April Weather21°C (70°F)77 mm (3.0 inches)86%extreme
May Weather19°C (67°F)43 mm (1.7 inches)82%very high
June Weather18°C (65°F)11 mm (0.4 inches)82%high
July Weather17°C (64°F)7 mm (0.3 inches)77%very high
August Weather18°C (65°F)23 mm (0.9 inches)72%very high
September Weather21°C (70°F)31 mm (1.2 inches)63%extreme
October Weather22°C (72°F)144 mm (5.7 inches)48%extreme
November Weather22°C (71°F)208 mm (8.2 inches)61%extreme
December Weather23°C (73°F)212 mm (8.3 inches)68%extreme

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