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September Weather in Rio Claro, Brazil

Last updated: August 22, 2025

In September, the average temperature in Rio Claro, Brazil is a pleasant 21°C (70°F). Expect a minimum of 12°C (54°F) and a maximum that can reach up to 35°C (96°F). With 58 mm (2.3 in) of precipitation spread over 9 days, you might want to keep an umbrella handy. The average humidity sits at a comfortable 68%, making it an ideal time for exploring the local scenery!

September Temperature in Rio Claro

In September in Rio Claro, the average temperature is 21°C (70°F). Maximum temperatures can reach 35°C (96°F), while the minimum can drop to as low as 12°C (54°F). This makes it an ideal time for travelers who enjoy mild weather with the option for warmer days.

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

The chart illustrates September temperature patterns in Rio Claro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Claro, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (96°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec767575716767646570717173
Data source: Temperature data for Rio Claro 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 Claro

In Rio Claro in September, the precipitation amount is 58 mm (2.3 in) spread over 9 days.

September Precipitation Trends in Rio Claro

The chart displays monthly precipitation patterns in Rio Claro, 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 Claro, September typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec238211202956835296558127174225
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Claro

In Rio Claro in September humidity is 68%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making the air feel slightly heavy and sticky, which can be quite exhausting for travelers.

September Average Humidity in Rio Claro

This chart illustrates the average monthly humidity levels in Rio Claro, 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 Claro is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%83%81%80%76%73%68%61%72%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Claro

In Rio Claro 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 Claro.

Maximum UV Index Levels in Rio Claro for September

The chart shows the monthly maximum UV Index (UVI) for Rio Claro 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 Claro typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16151311867912131415
Data source: Rio Claro 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 Claro Compares to Other Months

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

This table compares monthly weather conditions in Rio Claro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)238 mm (9.4 inches)85%extreme
February Weather24°C (75°F)211 mm (8.3 inches)85%extreme
March Weather24°C (75°F)202 mm (7.9 inches)86%extreme
April Weather22°C (71°F)95 mm (3.7 inches)83%extreme
May Weather20°C (68°F)68 mm (2.7 inches)81%very high
June Weather19°C (67°F)35 mm (1.4 inches)80%high
July Weather18°C (65°F)29 mm (1.1 inches)76%high
August Weather18°C (66°F)65 mm (2.6 inches)73%very high
September Weather21°C (70°F)58 mm (2.3 inches)68%extreme
October Weather22°C (72°F)127 mm (5.0 inches)61%extreme
November Weather22°C (71°F)174 mm (6.8 inches)72%extreme
December Weather23°C (74°F)225 mm (8.8 inches)75%extreme

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