Brentwood
California, USA
Long-term weather forecast
Long-term weather forecast

August 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
The last month of the summer, August, is also a hot month in Brentwood, California, with average temperature varying between 57.4°F (14.1°C) and 87.4°F (30.8°C).

Temperature

In Brentwood, the average high-temperature in August is essentially the same as in July - a still hot 87.4°F (30.8°C). In Brentwood, in August, the average low-temperature is 57.4°F (14.1°C).

Heat index

The average heat index in August is evaluated at a tropical 92.3°F (33.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity is 56%.

Rainfall

Months with the least rainfall in Brentwood are July and August Rain falls for 0.8 days and accumulates 0.04" (1mm) of rain.

Snowfall

January through November are months without snowfall.

Daylight

In Brentwood, the average length of the day is 13.6h.

Sunshine

In August, the average sunshine in Brentwood is 11.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Brentwood?

The average high-temperature, in August, is 87.4°F (30.8°C), while the average low-temperature is 57.4°F (14.1°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, is appraised at 92.3°F (33.5°C).

What is the average humidity in August in Brentwood?

In Brentwood, the average relative humidity in August is 56%.

How much does it rain in Brentwood in August?

In Brentwood, California, during August, the rain falls for 0.8 days and regularly aggregates up to 0.04" (1mm) of precipitation.

What is the driest month in Brentwood?

July and August are months with the least rain in Brentwood when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

When it does not snow in Brentwood?

In Brentwood, California, snow does not fall in January through November.

What is the average length of the day in August in Brentwood?

The average length of the day in August is 13.6h.

How many hours of sunshine does Brentwood have in August?

In Brentwood, California, the average sunshine in August is 11.9h.

What is the month with the highest UV index in Brentwood?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in August in Brentwood?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Brentwood, CA
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in August: 57.4°F

The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average humidity in August - Brentwood, CA
  • Average humidity in August: 56%

The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).

Average rainfall in August - Brentwood, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is February (2.09").
Driest months (with the lowest rainfall) are July and August (0.04").

Average rainfall days in August - Brentwood, CA
  • Average rainfall days in August: 0.8 days

The month with the highest number of rainy days is March (12.3 days).
The month with the lowest number of rainy days is August (0.8 days).

Average snowfall days in August - Brentwood, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (0.1 days).
Months with the lowest number of snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in August / Average sunshine in August - Brentwood, CA
  • Average daylight in August: 13.6h

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

  • Average sunshine in August: 11.9h

The month with most sunshine is July (Average sunshine: 12.1h).
The month with least sunshine is December (Average sunshine: 5.8h).

Average UV index in August - Brentwood, CA
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).