September weather forecast and climate
Brentwood, CA

An aerial shot of scenic and organized home community in Brentwood City, California
An aerial shot of scenic and organized home community in Brentwood City, California

Temperature

In Brentwood, the average high-temperature is 86°F (30°C), and the average low-temperature is 57°F (13.9°C).

Rainfall

Throughout September, 0.2" (4.6mm) of precipitation is accumulated. During the entire year, Brentwood aggregates up to 13.3" (337.7mm) of precipitation.

Daylight

In Brentwood, the average length of the day in September is 12.4h.

What is the temperature in September in Brentwood?

The average high-temperature, in September, in Brentwood, California, is 86°F (30°C), while the average low-temperature is 57°F (13.9°C).

How much does it rain in Brentwood in September?

In Brentwood, California, in September, 0.2" (4.6mm) of precipitation is typically accumulated.

How many hours of daylight does Brentwood have in September?

The average length of the day in September in Brentwood, California, is 12.4h.
Average temperature in September - Brentwood, CA
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (92°F).
The month with the lowest average high temperature is January (54°F).

  • Average low temperature in September: 57°F

Months with the highest average low temperature are July and August (59°F).
Coldest months (with the lowest average low temperature) are January and December (39°F).

Average rainfall in September - Brentwood, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is January (2.7").
Driest months (with the lowest rainfall) are July and August (0").

Average daylight in September - Brentwood, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.6h).

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