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September Weather in San Pablo, United States

Last updated: June 24, 2025

In San Pablo, United States, the average temperature in September is a pleasant 20°C (68°F). Temperatures can vary widely, with a minimum of 8°C (46°F) and a maximum reaching 43°C (111°F). The region experiences minimal precipitation, averaging just 1 mm (0.0 in) over 0 days. Additionally, enjoy a comfortable average humidity of 55%, making it an ideal time to visit!

September Temperature in San Pablo

In September in San Pablo, the average temperature is 20°C (68°F). Maximum temperatures can reach 43°C (111°F), while minimums can drop to as low as 8°C (46°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in San Pablo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Pablo, September typically has an average temperature of 20°C (68°F), with highs reaching up to 43°C (111°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec505254596267676868645550
Data source: Temperature data for San Pablo 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 Pablo

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

September Precipitation Trends in San Pablo

The chart displays monthly precipitation patterns in San Pablo, 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 Pablo, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec1011017732182001254188
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Pablo

In San Pablo in September humidity is 55%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it comfortable for traveling but slightly sticky, encouraging leisurely strolls and relaxed outdoor activities.

September Average Humidity in San Pablo

This chart illustrates the average monthly humidity levels in San Pablo, 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 Pablo is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Pablo

In San Pablo in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Pablo.

Maximum UV Index Levels in San Pablo for September

The chart shows the monthly maximum UV Index (UVI) for San Pablo 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 Pablo typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109643
Data source: San Pablo 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 Pablo Compares to Other Months

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

This table compares monthly weather conditions in San Pablo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)101 mm (4.0 inches)82%moderate
February Weather11°C (53°F)101 mm (4.0 inches)84%moderate
March Weather12°C (54°F)77 mm (3.0 inches)82%very high
April Weather15°C (59°F)32 mm (1.3 inches)78%very high
May Weather17°C (63°F)18 mm (0.7 inches)71%very high
June Weather19°C (67°F)1 mm (0.1 inches)64%extreme
July Weather19°C (67°F)0 mm (0.0 inches)58%extreme
August Weather20°C (68°F)0 mm (0.0 inches)54%very high
September Weather20°C (68°F)1 mm (0.0 inches)55%very high
October Weather18°C (64°F)25 mm (1.0 inches)62%high
November Weather13°C (56°F)41 mm (1.6 inches)78%moderate
December Weather10°C (50°F)88 mm (3.5 inches)80%moderate

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