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September Weather in San Clemente, Peru

Last updated: August 27, 2025

In September, the average temperature in San Clemente, Peru is a pleasant 17°C (62°F), with lows dipping to 14°C (57°F) and highs reaching up to 21°C (69°F). Rain is scarce, with only 1 mm (0.0 in) of precipitation observed over 0 days. You can also expect a comfortable average humidity of 53%, making this month ideal for outdoor activities!

September Temperature in San Clemente

In September in San Clemente, the average temperature is 17°C (62°F). Maximum temperatures can reach 21°C (69°F), while minimums can drop to as low as 14°C (57°F). This moderate climate makes San Clemente an ideal destination for travelers looking to enjoy comfortable weather.

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

The chart illustrates September temperature patterns in San Clemente, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Clemente, September typically has an average temperature of 17°C (62°F), with highs reaching up to 21°C (69°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec727373706664626162636568
Data source: Temperature data for San Clemente 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 Clemente

In San Clemente in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in San Clemente

The chart displays monthly precipitation patterns in San Clemente, 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 Clemente, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec1396423211123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Clemente

In San Clemente in September, humidity is 53%. With an average temperature of 17°C (62°F), this humidity feels like a mild and comfortable embrace, making it a pleasant experience for traveling, allowing you to explore the sights without feeling overly sticky or overly dry.

September Average Humidity in San Clemente

This chart illustrates the average monthly humidity levels in San Clemente, 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 Clemente is approximately 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Clemente

In San Clemente in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Clemente.

Maximum UV Index Levels in San Clemente for September

The chart shows the monthly maximum UV Index (UVI) for San Clemente 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 Clemente typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14141413109101113141514
Data source: San Clemente 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 Clemente Compares to Other Months

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

This table compares monthly weather conditions in San Clemente, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)13 mm (0.5 inches)89%extreme
February Weather23°C (74°F)9 mm (0.3 inches)89%extreme
March Weather23°C (74°F)6 mm (0.2 inches)90%extreme
April Weather21°C (71°F)4 mm (0.2 inches)89%extreme
May Weather19°C (67°F)2 mm (0.1 inches)83%very high
June Weather18°C (64°F)3 mm (0.1 inches)69%very high
July Weather17°C (63°F)2 mm (0.1 inches)56%very high
August Weather16°C (62°F)1 mm (0.0 inches)50%extreme
September Weather17°C (62°F)1 mm (0.0 inches)53%extreme
October Weather17°C (63°F)1 mm (0.1 inches)68%extreme
November Weather18°C (65°F)2 mm (0.1 inches)81%extreme
December Weather20°C (69°F)3 mm (0.1 inches)87%extreme

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