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September Weather in Mercedes, Argentina

Last updated: August 22, 2025

In September, the average temperature in Mercedes, Argentina hovers around 14°C (57°F). Expect a chilly low of -1°C (31°F) and the warmth of a maximum of 30°C (86°F). During this month, 77 mm (3.0 in) of precipitation typically falls over the course of 6 days, accompanied by an average humidity of 72%.

September Temperature in Mercedes

In September in Mercedes, the average temperature is 14°C (57°F). Maximum temperatures can reach 30°C (86°F), while the minimum can drop as low as -1°C (31°F). This makes it essential for travelers to pack layers to accommodate the varying temperatures throughout the day.

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

The chart illustrates September temperature patterns in Mercedes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercedes, September typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (86°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec757369645652505357626873
Data source: Temperature data for Mercedes 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 Mercedes

In Mercedes in September, the total precipitation amount is 77 mm (3.0 in) occurring over a span of 6 days.

September Precipitation Trends in Mercedes

The chart displays monthly precipitation patterns in Mercedes, 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 Mercedes, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec766377947644444577896577
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mercedes

In Mercedes in September humidity is 72%. With an average temperature of 14°C (57°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and requiring careful planning to stay hydrated and enjoy your travels.

September Average Humidity in Mercedes

This chart illustrates the average monthly humidity levels in Mercedes, 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 Mercedes is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%61%66%80%85%80%69%66%72%63%59%56%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mercedes

In Mercedes in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Mercedes.

Maximum UV Index Levels in Mercedes for September

The chart shows the monthly maximum UV Index (UVI) for Mercedes 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 Mercedes typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311753468101314
Data source: Mercedes 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 Mercedes Compares to Other Months

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

This table compares monthly weather conditions in Mercedes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)76 mm (3.0 inches)50%extreme
February Weather23°C (73°F)63 mm (2.5 inches)61%extreme
March Weather21°C (69°F)77 mm (3.0 inches)66%extreme
April Weather18°C (64°F)94 mm (3.7 inches)80%high
May Weather13°C (57°F)76 mm (3.0 inches)85%moderate
June Weather11°C (52°F)44 mm (1.7 inches)80%moderate
July Weather10°C (50°F)43 mm (1.7 inches)69%moderate
August Weather12°C (53°F)45 mm (1.8 inches)66%high
September Weather14°C (57°F)77 mm (3.0 inches)72%very high
October Weather16°C (62°F)89 mm (3.5 inches)63%very high
November Weather20°C (69°F)65 mm (2.6 inches)59%extreme
December Weather23°C (73°F)77 mm (3.0 inches)56%extreme

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