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September Weather in San Cosme, Argentina

Last updated: August 22, 2025

In September the average temperature in San Cosme, Argentina is a comfortable 21°C (69°F). However, be prepared for fluctuations, as temperatures can dip to a chilly 8°C (46°F) or soar to a scorching 41°C (105°F). During this time, expect an average precipitation of 89 mm (3.5 in) spread over 9 days, and a moderate average humidity of 50%.

September Temperature in San Cosme

In September in San Cosme, the average temperature is 21°C (69°F), with maximums reaching up to 41°C (105°F) and minimums dropping as low as 8°C (46°F). This wide temperature range makes it essential for travelers to pack accordingly to ensure comfort during their visit.

September Weather in San Cosme: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Cosme, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Cosme, September typically has an average temperature of 21°C (69°F), with highs reaching up to 41°C (105°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec828177726562616469737780
Data source: Temperature data for San Cosme 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 San Cosme

In San Cosme in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

September Precipitation Trends in San Cosme

The chart displays monthly precipitation patterns in San Cosme, 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 San Cosme, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec130721361261396642448912414872
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Cosme

In San Cosme in September humidity is 50%. With an average temperature of 21°C (69°F), this humidity feels like a pleasant embrace, making it comfortable for traveling and exploring without feeling overheated or sluggish.

September Average Humidity in San Cosme

This chart illustrates the average monthly humidity levels in San Cosme, 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 San Cosme 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 San Cosme

In San Cosme 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 San Cosme.

Maximum UV Index Levels in San Cosme for September

The chart shows the monthly maximum UV Index (UVI) for San Cosme 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 San Cosme typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310756710131414
Data source: San Cosme 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 San Cosme Compares to Other Months

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

This table compares monthly weather conditions in San Cosme, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)130 mm (5.1 inches)76%extreme
February Weather27°C (81°F)72 mm (2.8 inches)70%extreme
March Weather25°C (78°F)136 mm (5.4 inches)73%extreme
April Weather22°C (72°F)126 mm (5.0 inches)83%very high
May Weather19°C (66°F)139 mm (5.5 inches)85%high
June Weather17°C (62°F)66 mm (2.6 inches)73%moderate
July Weather16°C (61°F)42 mm (1.7 inches)63%high
August Weather18°C (64°F)44 mm (1.7 inches)44%high
September Weather21°C (69°F)89 mm (3.5 inches)50%very high
October Weather23°C (74°F)124 mm (4.9 inches)53%extreme
November Weather25°C (77°F)148 mm (5.8 inches)66%extreme
December Weather27°C (81°F)72 mm (2.8 inches)82%extreme

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