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September Weather in San Carlos, Chile

Last updated: August 22, 2025

In September, the average temperature in San Carlos, Chile hovers around 11°C (52°F), with lows dipping to -1°C (31°F) and highs peaking at 26°C (79°F). Expect around 85 mm (3.3 in) of precipitation over approximately 6 days, contributing to an average humidity of 68%. Whether you're exploring or enjoying the scenery, be prepared for a mix of weather this month!

September Temperature in San Carlos

In September in San Carlos, the average temperature is 11°C (52°F), with maximums reaching 26°C (79°F) and minimums dipping as low as -1°C (31°F). This range of temperatures makes San Carlos an ideal destination for travelers seeking a mix of mild and cooler weather experiences.

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

The chart illustrates September temperature patterns in San Carlos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Carlos, September typically has an average temperature of 11°C (52°F), with highs reaching up to 26°C (79°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec686863575148474852556166
Data source: Temperature data for San Carlos 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 Carlos

In San Carlos in September, the precipitation amount is 85 mm (3.3 in) over the course of 6 days.

September Precipitation Trends in San Carlos

The chart displays monthly precipitation patterns in San Carlos, 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 Carlos, September typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec20919461312561351538568297
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Carlos

In San Carlos in September humidity is 68%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill clinging to your skin, making outdoor activities a bit uncomfortable and requiring an extra layer for warmth while exploring.

September Average Humidity in San Carlos

This chart illustrates the average monthly humidity levels in San Carlos, 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 Carlos is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec41%41%48%60%79%83%86%83%68%64%49%42%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Carlos

In San Carlos in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in San Carlos.

Maximum UV Index Levels in San Carlos for September

The chart shows the monthly maximum UV Index (UVI) for San Carlos 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 Carlos typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141310753457101314
Data source: San Carlos 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 Carlos Compares to Other Months

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

This table compares monthly weather conditions in San Carlos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)20 mm (0.8 inches)41%extreme
February Weather20°C (68°F)9 mm (0.4 inches)41%extreme
March Weather17°C (63°F)19 mm (0.7 inches)48%very high
April Weather14°C (57°F)46 mm (1.8 inches)60%high
May Weather10°C (51°F)131 mm (5.2 inches)79%moderate
June Weather9°C (48°F)256 mm (10.1 inches)82%moderate
July Weather8°C (47°F)135 mm (5.3 inches)85%moderate
August Weather9°C (48°F)153 mm (6.0 inches)83%moderate
September Weather11°C (52°F)85 mm (3.3 inches)68%high
October Weather13°C (55°F)68 mm (2.7 inches)64%very high
November Weather16°C (61°F)29 mm (1.2 inches)49%extreme
December Weather19°C (66°F)7 mm (0.3 inches)42%extreme

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