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September Weather in Oakley, United States

Last updated: June 24, 2025

In September, the average temperature in Oakley, United States is a cool 12°C (54°F). However, be prepared for a range of temperatures, with a minimum plunging to -11°C (13°F) and a maximum soaring to 30°C (87°F). The month also sees 43 mm (1.7 in) of precipitation spread over 7 days, contributing to an average humidity level of 46%.

September Temperature in Oakley

In September in Oakley, the average temperature is 12°C (54°F), with maximums reaching up to 30°C (87°F) and minimums dropping as low as -11°C (13°F). Be prepared for diverse weather conditions during your travels, ranging from warm days to chilly nights.

September Weather in Oakley: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Oakley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oakley, September typically has an average temperature of 12°C (54°F), with highs reaching up to 30°C (87°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec212331344357656354382920
Data source: Temperature data for Oakley 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 Oakley

In Oakley in September, the total precipitation amount is 43 mm (1.7 in) spread over a period of 7 days.

September Precipitation Trends in Oakley

The chart displays monthly precipitation patterns in Oakley, 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 Oakley, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec728682626630364343535668
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oakley

In Oakley in September humidity is 46%. With an average temperature of 12°C (54°F), this humidity feels like a refreshing embrace, making outdoor exploration comfortable and enjoyable for travelers.

September Average Humidity in Oakley

This chart illustrates the average monthly humidity levels in Oakley, 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 Oakley is approximately 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Oakley

In Oakley 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 Oakley.

Maximum UV Index Levels in Oakley for September

The chart shows the monthly maximum UV Index (UVI) for Oakley 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 Oakley typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111212121110753
Data source: Oakley 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 Oakley Compares to Other Months

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

This table compares monthly weather conditions in Oakley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)72 mm (2.8 inches)91%moderate
February Weather-5°C (23°F)86 mm (3.4 inches)92%high
March Weather0°C (32°F)82 mm (3.2 inches)84%very high
April Weather1°C (35°F)62 mm (2.5 inches)74%extreme
May Weather6°C (43°F)66 mm (2.6 inches)62%extreme
June Weather14°C (57°F)30 mm (1.2 inches)56%extreme
July Weather18°C (65°F)36 mm (1.4 inches)44%extreme
August Weather17°C (63°F)43 mm (1.7 inches)37%extreme
September Weather12°C (54°F)43 mm (1.7 inches)46%very high
October Weather3°C (38°F)53 mm (2.1 inches)67%high
November Weather-2°C (29°F)56 mm (2.2 inches)84%moderate
December Weather-7°C (20°F)68 mm (2.7 inches)88%moderate

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