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September Weather in San Carlos, Peru

Last updated: August 27, 2025

In San Carlos, Peru, the average temperature in September hovers around 14°C (57°F), with a minimum of 7°C (45°F) and a maximum reaching 21°C (71°F). Expect precipitation to be significant, with about 255 mm (10.0 in) falling over 28 days. The average humidity during this time is a comfortable 42%, making it a unique month to experience the local climate.

September Temperature in San Carlos

In September in San Carlos, the average temperature is 14°C (57°F), with maximums reaching 21°C (71°F) and minimums dipping as low as 7°C (45°F). This mild climate makes it an ideal time for outdoor activities and sightseeing.

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 14°C (57°F), with highs reaching up to 21°C (71°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec595959595958575757586059
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 total precipitation amount is 255 mm (10.0 in) over a duration of 28 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 255 mm (10.0 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec250246371329287162143133255324308283
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 42%. With average temperature 14°C (57°F), this humidity feels like a mild and refreshing breeze, making it pleasant for exploring the area without feeling overly hot or sticky.

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 42%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%88%85%78%62%44%38%42%58%69%82%
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 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to 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 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171719181513131416171616
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 Weather15°C (59°F)250 mm (9.9 inches)83%extreme
February Weather15°C (60°F)246 mm (9.7 inches)81%extreme
March Weather15°C (59°F)371 mm (14.6 inches)88%extreme
April Weather15°C (59°F)329 mm (12.9 inches)85%extreme
May Weather15°C (59°F)287 mm (11.3 inches)78%extreme
June Weather14°C (58°F)161 mm (6.4 inches)62%extreme
July Weather14°C (57°F)143 mm (5.6 inches)44%extreme
August Weather14°C (57°F)133 mm (5.2 inches)38%extreme
September Weather14°C (57°F)255 mm (10.0 inches)42%extreme
October Weather15°C (59°F)324 mm (12.8 inches)58%extreme
November Weather15°C (60°F)308 mm (12.1 inches)69%extreme
December Weather15°C (60°F)283 mm (11.2 inches)82%extreme

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