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September Weather in Merlo, Argentina

Last updated: August 22, 2025

In September, the average temperature in Merlo, Argentina hovers around 14°C (58°F). Expect minimums dipping to 0°C (32°F) and highs reaching up to 30°C (86°F). Rainfall averages 75 mm (3.0 in) spread across approximately 6 days, while the average humidity sits comfortably at 72%.

September Temperature in Merlo

In September in Merlo, the average temperature is 14°C (58°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as 0°C (32°F). This variation makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Merlo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merlo, September typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec767370655752505357626873
Data source: Temperature data for Merlo 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 Merlo

In Merlo in September, the precipitation amount is 75 mm (3.0 in) occurring over a span of 6 days.

September Precipitation Trends in Merlo

The chart displays monthly precipitation patterns in Merlo, 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 Merlo, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec676372836856534575967468
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Merlo

In Merlo in September, humidity is 72%. With an average temperature of 14°C (58°F), this humidity feels like a damp blanket wrapping around you, making walking and exploring slightly uncomfortable and requiring frequent breaks for hydration.

September Average Humidity in Merlo

This chart illustrates the average monthly humidity levels in Merlo, 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 Merlo 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 Merlo

In Merlo 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 Merlo.

Maximum UV Index Levels in Merlo for September

The chart shows the monthly maximum UV Index (UVI) for Merlo 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 Merlo typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141211753468101314
Data source: Merlo 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 Merlo Compares to Other Months

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

This table compares monthly weather conditions in Merlo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)67 mm (2.6 inches)50%extreme
February Weather23°C (74°F)63 mm (2.5 inches)61%extreme
March Weather21°C (70°F)72 mm (2.8 inches)66%extreme
April Weather18°C (65°F)83 mm (3.3 inches)80%high
May Weather14°C (57°F)68 mm (2.7 inches)85%moderate
June Weather11°C (52°F)56 mm (2.2 inches)80%moderate
July Weather10°C (51°F)53 mm (2.1 inches)69%moderate
August Weather12°C (53°F)45 mm (1.8 inches)66%high
September Weather14°C (58°F)75 mm (3.0 inches)72%very high
October Weather17°C (62°F)96 mm (3.8 inches)63%very high
November Weather20°C (69°F)74 mm (2.9 inches)59%extreme
December Weather23°C (73°F)68 mm (2.7 inches)56%extreme

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