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September Weather in San Pedro, Argentina

Last updated: August 22, 2025

In September, the average temperature in San Pedro, Argentina is a pleasant 21°C (70°F). You might experience a comfortable range with a minimum of 7°C (45°F) and up to a sweltering maximum of 37°C (99°F). Be prepared for occasional showers, as the region sees about 100 mm (3.9 in) of precipitation over 9 days, coupled with an average humidity of 62%.

September Temperature in San Pedro

In September in San Pedro, the average temperature is 21°C (70°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 7°C (45°F). This makes San Pedro a great destination for travelers looking for mild weather and the possibility of warm days.

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

The chart illustrates September temperature patterns in San Pedro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Pedro, September typically has an average temperature of 21°C (70°F), with highs reaching up to 37°C (99°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec757472686361606369707275
Data source: Temperature data for San Pedro 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 Pedro

In San Pedro in September, the precipitation amount is 100 mm (3.9 in) spread over 9 days.

September Precipitation Trends in San Pedro

The chart displays monthly precipitation patterns in San Pedro, 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 Pedro, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1721401531121901586773100196137162
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Pedro

In San Pedro in September humidity is 62%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket—comfortable yet slightly muggy, making it ideal for exploring in the early morning or late afternoon when the air is cooler and more refreshing.

September Average Humidity in San Pedro

This chart illustrates the average monthly humidity levels in San Pedro, 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 Pedro is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%74%72%78%82%78%73%59%62%65%76%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Pedro

In San Pedro 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 Pedro.

Maximum UV Index Levels in San Pedro for September

The chart shows the monthly maximum UV Index (UVI) for San Pedro 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 Pedro typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15151310756810131515
Data source: San Pedro 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 Pedro Compares to Other Months

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

This table compares monthly weather conditions in San Pedro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)172 mm (6.8 inches)79%extreme
February Weather23°C (74°F)140 mm (5.5 inches)74%extreme
March Weather22°C (73°F)153 mm (6.0 inches)72%extreme
April Weather20°C (68°F)112 mm (4.4 inches)78%very high
May Weather17°C (63°F)190 mm (7.5 inches)82%high
June Weather16°C (61°F)158 mm (6.2 inches)78%moderate
July Weather15°C (60°F)67 mm (2.6 inches)73%high
August Weather17°C (63°F)73 mm (2.9 inches)58%very high
September Weather21°C (70°F)100 mm (3.9 inches)62%very high
October Weather21°C (70°F)196 mm (7.7 inches)65%extreme
November Weather22°C (72°F)137 mm (5.4 inches)76%extreme
December Weather24°C (75°F)162 mm (6.4 inches)85%extreme

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