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September Weather in San Pedro, Peru

Last updated: August 27, 2025

In San Pedro, Peru, the average temperature in September is a cool 6°C (42°F). Expect a minimum of -5°C (22°F) and a maximum of 17°C (62°F) throughout the month. With an average precipitation of 91 mm (3.6 in) over 19 days, it's wise to prepare for some rainy spells. The average humidity sits at a comfortable 53%, making for a refreshing atmosphere.

September Temperature in San Pedro

In September in San Pedro, the average temperature is 6°C (42°F). The maximum can reach 17°C (62°F), and the minimum can be as low as -5°C (22°F). Travelers should be prepared for a wide range of temperatures during this time and dress in layers to ensure comfort.

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 6°C (42°F), with highs reaching up to 17°C (62°F) and lows dropping to around -5°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec444343434140394042424343
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 total precipitation amount is 91 mm (3.6 in) spread over 19 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 91 mm (3.6 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec2572622831226335293091113116166
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 53%. With an average temperature of 6°C (42°F), this humidity feels like a crisp, brisk chill that can make outdoor exploration invigorating but requires proper layering to stay comfortable while traveling.

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 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%90%84%67%53%47%53%67%75%83%
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 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 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 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec191920171311131416181919
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 Weather6°C (44°F)257 mm (10.1 inches)89%extreme
February Weather6°C (44°F)262 mm (10.3 inches)90%extreme
March Weather6°C (44°F)283 mm (11.1 inches)90%extreme
April Weather6°C (43°F)122 mm (4.8 inches)90%extreme
May Weather5°C (41°F)63 mm (2.5 inches)84%extreme
June Weather4°C (40°F)35 mm (1.4 inches)67%extreme
July Weather4°C (40°F)29 mm (1.1 inches)53%extreme
August Weather5°C (41°F)30 mm (1.2 inches)47%extreme
September Weather6°C (42°F)91 mm (3.6 inches)53%extreme
October Weather6°C (43°F)113 mm (4.5 inches)67%extreme
November Weather6°C (44°F)116 mm (4.6 inches)75%extreme
December Weather6°C (44°F)166 mm (6.5 inches)82%extreme

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