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September Weather in Rio Grande, Argentina

Last updated: August 22, 2025

In September, the average temperature in Rio Grande, Argentina hovers around 5°C (41°F). Expect a chilly atmosphere with minimums dipping to -2°C (29°F) and maximums reaching 11°C (53°F). Rainfall is modest, with an average precipitation of 23 mm (0.9 in) spread over 6 days and a notable average humidity of 83%. Prepare for a cool and damp experience!

September Temperature in Rio Grande

In September in Rio Grande, the average temperature is 5°C (41°F). Maximums can reach 11°C (53°F), while minimums can drop as low as -2°C (29°F). Travelers should be prepared for cool and variable weather conditions.

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

The chart illustrates September temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, September typically has an average temperature of 5°C (41°F), with highs reaching up to 11°C (53°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec515250464238373840434750
Data source: Temperature data for Rio Grande 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 Grande

In Rio Grande in September, the precipitation amount is 23 mm (0.9 in) spread over 6 days.

September Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Grande, September typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec493859415132303824293639
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Grande

In Rio Grande in September humidity is 83%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm and dry.

September Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Grande is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%80%82%86%88%90%89%86%83%81%79%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Grande

In Rio Grande in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Rio Grande for better planning.

Maximum UV Index Levels in Rio Grande for September

The chart shows the monthly maximum UV Index (UVI) for Rio Grande 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 Grande typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec108632113491210
Data source: Rio Grande 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 Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)49 mm (1.9 inches)79%very high
February Weather11°C (52°F)38 mm (1.5 inches)80%very high
March Weather10°C (50°F)59 mm (2.3 inches)82%high
April Weather8°C (46°F)41 mm (1.6 inches)86%moderate
May Weather6°C (43°F)51 mm (2.0 inches)88%low
June Weather3°C (38°F)32 mm (1.3 inches)89%low
July Weather3°C (37°F)30 mm (1.2 inches)89%low
August Weather4°C (39°F)38 mm (1.5 inches)86%moderate
September Weather5°C (41°F)23 mm (0.9 inches)83%moderate
October Weather6°C (43°F)29 mm (1.1 inches)81%very high
November Weather8°C (47°F)36 mm (1.4 inches)79%extreme
December Weather10°C (51°F)39 mm (1.5 inches)79%very high

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