Brentwood (CA) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Brentwood

Brentwood average temperature chart (Celsius) Brentwood average temperature chart (Fahrenheit)
Average monthly temperatures in Brentwood (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.2 15.7 17.7 20.8 24.7 28.4 31.1 30.9 29.1 24.8 17.5 12.4
°F 54 60.2 63.8 69.5 76.4 83.2 87.9 87.6 84.4 76.6 63.5 54.4

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Brentwood monthly rainfall chart (mm) Brentwood monthly rainfall chart (inches)
Average monthly rainfall in Brentwood (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 81 61 53 29 8 3 1 2 6 24 55 62
inches 3.2 2.4 2.1 1.1 0.3 0.1 0.1 0.1 0.2 1 2.2 2.4
Rainy days 9 9 9 6 2 1 1 1 2 4 8 9

Average annual rainfall in Brentwood: 302.167mm (119 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Brentwood

Brentwood average daily sunshine chart
Average daily sunshine Brentwood
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.9 7.9 9.5 11.5 12.7 13.1 13.1 12.1 11.2 9.6 6.8 5.4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Brentwood average minimum / maximum temperatures (Celsius) Brentwood average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Brentwood (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.6 4.7 5.9 7.1 9.6 12 13.1 13.3 12.3 9.5 5.8 3
Max °C 12.5 16 18 21.2 25.1 28.9 31.5 31.3 29.5 25.2 17.8 12.7
Min °F 36.6 40.4 42.5 44.7 49.2 53.5 55.6 55.9 54.1 49 42.4 37.3
Max °F 45.5 50.5 53.4 57.4 63.1 68.7 72.1 72.1 69.6 63.1 53.2 46

Sea temperature

The graph below shows the average sea temperature.

Brentwood average sea temperature chart (Celsius) Brentwood average sea temperature chart (Fahrenheit)
Average sea temperature around Brentwood in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.4 12.3 12.2 12 12.1 12.7 13.7 14.6 14.9 14.6 13.8 12.9
°F 54.4 54.1 54 53.6 53.8 54.8 56.7 58.3 58.9 58.3 56.9 55.2

Wind speed

The graph below shows the average wind speed.

Brentwood average winspeed by month (km/h) Brentwood average winspeed by month (mph)
Average wind speed in Brentwood (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 13 16 17 18 19 17 17 14 13 12 12
mph 7 8 10 10 11 12 11 10 9 8 7 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Brentwood relative humidity averages
Average relative humidity in Brentwood
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
81% 77% 72% 66% 61% 59% 58% 60% 61% 65% 76% 82%

Other monthly averages

UV index Best time to go?

Brentwood weather stats

Brentwood weather statistics
Hottest month: July 31.1°C 88°F
Driest month: July 1mm 0ins
Sunniest month: July 13.1hrs
Coldest month: January 12.2°C 54°F
Wettest month: January 81mm 3.2ins
Warmest sea: September 14.9°C 58.8°F
Map showing location of Brentwood (37.92687, -121.72577) Brentwood map pin © Google

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