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September Weather in Los Altos, Argentina

Last updated: August 22, 2025

In Los Altos, Argentina, the average temperature in September is a comfortable 16°C (62°F). However, be prepared for a range of conditions, as temperatures can dip to a chilly 0°C (32°F) or climb to a warm 34°C (94°F). During this month, expect approximately 43 mm (1.7 in) of precipitation over 7 days, with an average humidity of 51% providing a balance of comfort and coolness.

September Temperature in Los Altos

In September in Los Altos, the average temperature is 16°C (62°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 0°C (32°F). This diverse temperature range makes Los Altos an ideal destination for travelers seeking both warm days and cool evenings.

September Weather in Los Altos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Los Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Altos, September typically has an average temperature of 16°C (62°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec757269655851505561677173
Data source: Temperature data for Los Altos 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 Los Altos

In Los Altos in September, the total precipitation amount is 43 mm (1.7 in) spread over a period of 7 days.

September Precipitation Trends in Los Altos

The chart displays monthly precipitation patterns in Los Altos, 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 Los Altos, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec142144175171903823104384126152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Los Altos

In Los Altos in September humidity is 51%. With an average temperature of 16°C (62°F), this humidity feels like a comfortable embrace, making it perfect for leisurely strolls and outdoor explorations.

September Average Humidity in Los Altos

This chart illustrates the average monthly humidity levels in Los Altos, 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 Los Altos 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 Los Altos

In Los Altos 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 Los Altos.

Maximum UV Index Levels in Los Altos for September

The chart shows the monthly maximum UV Index (UVI) for Los Altos 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 Los Altos typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310756710131515
Data source: Los Altos 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 Los Altos Compares to Other Months

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

This table compares monthly weather conditions in Los Altos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)142 mm (5.6 inches)63%extreme
February Weather22°C (73°F)144 mm (5.7 inches)66%extreme
March Weather21°C (70°F)175 mm (6.9 inches)68%extreme
April Weather18°C (65°F)171 mm (6.7 inches)83%very high
May Weather14°C (58°F)90 mm (3.5 inches)82%high
June Weather11°C (51°F)38 mm (1.5 inches)72%moderate
July Weather10°C (51°F)23 mm (0.9 inches)57%high
August Weather13°C (55°F)10 mm (0.4 inches)42%high
September Weather16°C (62°F)43 mm (1.7 inches)51%very high
October Weather19°C (67°F)84 mm (3.3 inches)47%extreme
November Weather22°C (71°F)125 mm (4.9 inches)58%extreme
December Weather23°C (74°F)152 mm (6.0 inches)61%extreme

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