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September Weather in La Merced, Argentina

Last updated: August 22, 2025

In September, the average temperature in La Merced, Argentina hovers around 13°C (55°F). Be prepared for a range of temperatures, with lows dipping to -3°C (27°F) and highs soaring up to 31°C (89°F). You can expect some light rain, with total precipitation of about 37 mm (1.5 in) spread over 7 days. The average humidity levels are a comfortable 51%, making for an enjoyable climate overall.

September Temperature in La Merced

In September in La Merced, the average temperature is 13°C (55°F). Maximums can reach 31°C (89°F) and minimums can be as low as -3°C (27°F). Be prepared for a wide range of temperatures if you're planning to visit during this time.

September Weather in La Merced: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Merced, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Merced, September typically has an average temperature of 13°C (55°F), with highs reaching up to 31°C (89°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec676462585246465055606365
Data source: Temperature data for La Merced 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 La Merced

In La Merced in September, the precipitation amount is 37 mm (1.5 in) during a span of 7 days.

September Precipitation Trends in La Merced

The chart displays monthly precipitation patterns in La Merced, 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 La Merced, September typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec16117913511756241583777137169
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Merced

In La Merced in September, humidity is 51%. With an average temperature of 13°C (55°F), this humidity feels like a pleasant, crisp atmosphere perfect for exploring. The refreshing air invigorates your senses, making it an ideal time for outdoor activities and sightseeing.

September Average Humidity in La Merced

This chart illustrates the average monthly humidity levels in La Merced, 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 La Merced is approximately 51%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%66%68%83%82%72%57%42%51%47%58%62%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Merced

In La Merced 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 La Merced.

Maximum UV Index Levels in La Merced for September

The chart shows the monthly maximum UV Index (UVI) for La Merced 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 La Merced typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16141310756710131515
Data source: La Merced 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 La Merced Compares to Other Months

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

This table compares monthly weather conditions in La Merced, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)161 mm (6.3 inches)63%extreme
February Weather18°C (64°F)179 mm (7.1 inches)66%extreme
March Weather16°C (62°F)135 mm (5.3 inches)68%extreme
April Weather14°C (58°F)117 mm (4.6 inches)83%very high
May Weather11°C (52°F)56 mm (2.2 inches)82%high
June Weather8°C (47°F)24 mm (0.9 inches)72%moderate
July Weather8°C (46°F)15 mm (0.6 inches)57%high
August Weather10°C (50°F)8 mm (0.3 inches)42%high
September Weather13°C (55°F)37 mm (1.5 inches)51%very high
October Weather15°C (60°F)77 mm (3.0 inches)47%extreme
November Weather17°C (63°F)137 mm (5.4 inches)58%extreme
December Weather18°C (65°F)169 mm (6.6 inches)61%extreme

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