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September Weather in Riachuelo, Argentina

Last updated: August 22, 2025

In September, the average temperature in Riachuelo, Argentina hovers around 20°C (69°F). Expect temperatures to range from a cooler 8°C (46°F) to a scorching 40°C (105°F). With an average precipitation of 84 mm (3.3 in) over 9 days, you might want to pack an umbrella! Don't forget that the average humidity sits at a comfortable 50%, making it a pleasant time to explore.

September Temperature in Riachuelo

In September in Riachuelo, the average temperature is 20°C (69°F). The maximum can reach 40°C (105°F), and the minimum can be as low as 8°C (46°F). Travelers should be prepared for a wide range of temperatures, making layers essential for a comfortable visit.

September Weather in Riachuelo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Riachuelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riachuelo, September typically has an average temperature of 20°C (69°F), with highs reaching up to 40°C (105°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec828077726562606368737680
Data source: Temperature data for Riachuelo 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 Riachuelo

In Riachuelo in September, the precipitation amount is 84 mm (3.3 in) spread over 9 days.

September Precipitation Trends in Riachuelo

The chart displays monthly precipitation patterns in Riachuelo, 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 Riachuelo, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec139701391221296038398411814776
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Riachuelo

In Riachuelo in September humidity is 50%. With an average temperature of 20°C (69°F), this humidity feels like a mild embrace, making it comfortable for leisurely strolls and outdoor adventures.

September Average Humidity in Riachuelo

This chart illustrates the average monthly humidity levels in Riachuelo, 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 Riachuelo is approximately 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%70%73%83%85%73%63%44%50%53%66%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Riachuelo

In Riachuelo in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Riachuelo.

Maximum UV Index Levels in Riachuelo for September

The chart shows the monthly maximum UV Index (UVI) for Riachuelo 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 Riachuelo typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14141210756710131414
Data source: Riachuelo 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 Riachuelo Compares to Other Months

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

This table compares monthly weather conditions in Riachuelo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)139 mm (5.5 inches)76%extreme
February Weather27°C (80°F)70 mm (2.8 inches)70%extreme
March Weather25°C (77°F)139 mm (5.5 inches)73%extreme
April Weather22°C (72°F)122 mm (4.8 inches)83%very high
May Weather18°C (65°F)129 mm (5.1 inches)85%high
June Weather16°C (62°F)60 mm (2.4 inches)73%moderate
July Weather15°C (60°F)38 mm (1.5 inches)63%high
August Weather17°C (64°F)39 mm (1.5 inches)44%high
September Weather20°C (69°F)84 mm (3.3 inches)50%very high
October Weather23°C (73°F)118 mm (4.6 inches)53%extreme
November Weather25°C (77°F)147 mm (5.8 inches)66%extreme
December Weather26°C (80°F)76 mm (3.0 inches)82%extreme

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