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September Weather in San Pedro, United States

Last updated: June 24, 2025

In September, the average temperature in San Pedro, United States hovers around 27°C (80°F), making it a warm destination. Expect temperatures to range from a cool 11°C (52°F) to a sizzling 39°C (103°F). Be prepared for some wet weather, as the region receives an average precipitation of 94 mm (3.7 in) over 11 days, contributing to the average humidity of 69%.

September Temperature in San Pedro

In September in San Pedro, the average temperature is 27°C (80°F). Maximums can reach up to 39°C (103°F), while minimums can drop as low as 11°C (52°F). This temperature range makes it advisable to pack both light clothing for the heat and warmer layers for cooler evenings when traveling.

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 27°C (80°F), with highs reaching up to 39°C (103°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec505362677582858580705954
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 94 mm (3.7 in) over the course of 11 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 94 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec100126103137175100791149411879117
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 69%. With an average temperature of 27°C (80°F), this humidity feels like a warm embrace that can leave you feeling sticky and lethargic, making it essential to stay hydrated and take frequent breaks while exploring.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec478111111121110864
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 Weather10°C (50°F)100 mm (3.9 inches)79%moderate
February Weather11°C (53°F)126 mm (5.0 inches)80%high
March Weather17°C (63°F)103 mm (4.1 inches)78%very high
April Weather19°C (67°F)137 mm (5.4 inches)79%extreme
May Weather24°C (75°F)174 mm (6.9 inches)81%extreme
June Weather28°C (82°F)100 mm (3.9 inches)77%extreme
July Weather29°C (85°F)79 mm (3.1 inches)71%extreme
August Weather30°C (85°F)114 mm (4.5 inches)67%extreme
September Weather27°C (80°F)94 mm (3.7 inches)69%very high
October Weather21°C (70°F)118 mm (4.7 inches)73%very high
November Weather15°C (59°F)79 mm (3.1 inches)82%high
December Weather12°C (54°F)117 mm (4.6 inches)87%moderate

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