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September Weather in Discovery Bay, United States

Last updated: June 24, 2025

In September, the average temperature in Discovery Bay, United States hovers around 22°C (72°F), with a range that can dip to a brisk 10°C (51°F) or soar to a steamy 41°C (105°F). Expect minimal rainfall this month—just 1 mm (0.0 in) over 0 days of precipitation, complemented by an average humidity level of 55%. Enjoy the delightful weather!

September Temperature in Discovery Bay

In September in Discovery Bay, the average temperature is 22°C (72°F). Maximums can reach 41°C (105°F), while minimums can drop as low as 10°C (51°F). Be prepared for a wide range of temperatures during your travels.

September Weather in Discovery Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Discovery Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Discovery Bay, September typically has an average temperature of 22°C (72°F), with highs reaching up to 41°C (105°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec505356626773747472655650
Data source: Temperature data for Discovery Bay 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 Discovery Bay

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

September Precipitation Trends in Discovery Bay

The chart displays monthly precipitation patterns in Discovery Bay, 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 Discovery Bay, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec101857234151001283885
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Discovery Bay

In Discovery Bay in September, humidity is 55%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, creating a pleasant and comfortable environment for traveling and exploring the area's attractions.

September Average Humidity in Discovery Bay

This chart illustrates the average monthly humidity levels in Discovery Bay, 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 Discovery Bay 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 Discovery Bay

In Discovery Bay 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 Discovery Bay.

Maximum UV Index Levels in Discovery Bay for September

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

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

This table compares monthly weather conditions in Discovery Bay, 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 Weather12°C (53°F)85 mm (3.3 inches)84%moderate
March Weather14°C (57°F)72 mm (2.8 inches)82%very high
April Weather17°C (62°F)34 mm (1.3 inches)78%very high
May Weather20°C (68°F)15 mm (0.6 inches)71%very high
June Weather23°C (73°F)1 mm (0.1 inches)64%extreme
July Weather23°C (75°F)0 mm (0.0 inches)58%extreme
August Weather23°C (74°F)0 mm (0.0 inches)54%very high
September Weather22°C (72°F)1 mm (0.0 inches)55%very high
October Weather18°C (65°F)28 mm (1.1 inches)62%high
November Weather13°C (56°F)38 mm (1.5 inches)78%moderate
December Weather10°C (50°F)85 mm (3.3 inches)80%moderate

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