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September Weather in Rio Claro, Brazil

Last updated: August 22, 2025

In September, the average temperature in Rio Claro, Brazil reaches a pleasant 23°C (74°F). Expect a wide range, with minimum temperatures dipping to 9°C (48°F) and maximums soaring up to 38°C (100°F). Be prepared for some precipitation, averaging 38 mm (1.5 in) over 5 days, and enjoy a comfortable average humidity of 54%.

September Temperature in Rio Claro

In September in Rio Claro, the average temperature is 23°C (74°F), with maximums reaching up to 38°C (100°F) and minimums dropping as low as 9°C (48°F). This variation makes it a perfect time to visit, so be prepared for warm days and cooler nights.

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 23°C (74°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec777676736867656774757476
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 total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 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 38 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec20717911253382174138110150164
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 54%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable and pleasant atmosphere for traveling, creating a mild environment that is neither too dry nor overly damp, making outdoor exploration enjoyable.

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 54%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%86%82%76%71%68%59%54%50%74%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec161613118671012131416
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)207 mm (8.1 inches)88%extreme
February Weather24°C (76°F)179 mm (7.0 inches)87%extreme
March Weather25°C (76°F)112 mm (4.4 inches)86%extreme
April Weather23°C (73°F)53 mm (2.1 inches)82%extreme
May Weather20°C (68°F)38 mm (1.5 inches)76%very high
June Weather19°C (67°F)21 mm (0.8 inches)71%high
July Weather18°C (66°F)7 mm (0.3 inches)67%high
August Weather20°C (67°F)41 mm (1.6 inches)59%very high
September Weather23°C (74°F)38 mm (1.5 inches)54%extreme
October Weather24°C (75°F)110 mm (4.3 inches)50%extreme
November Weather23°C (75°F)150 mm (5.9 inches)74%extreme
December Weather24°C (76°F)164 mm (6.5 inches)83%extreme

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