August weather forecast and climate
Antioch, CA

A high bridge passing over the famous San Joaquin River Delta in Antioch, California
A high bridge passing over the famous San Joaquin River Delta in Antioch, California

Weather in August

August, the last month of the summer, in Antioch, is another tropical month, with average temperature varying between 87.4°F (30.8°C) and 57.4°F (14.1°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still tropical 87.4°F (30.8°C). The average low-temperature, in Antioch, is 57.4°F (14.1°C).

Heat index

In August, the average heat index is evaluated at a tropical 92.3°F (33.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, pregnancy, differences in body mass, height, and shape). 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

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

Snowfall

In Antioch snow does not fall in January through November.

Daylight

In August, the average length of the day in Antioch is 13.6h.

Sunshine

In August, the average sunshine is 11.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Antioch, California. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Antioch?

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

What is the average humidity in August in Antioch?

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

How many days does it rain in August in Antioch?

In Antioch, in August, it is raining for 0.8 days, with typically 0.04" (1mm) of accumulated precipitation.

What is the driest month in Antioch?

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

When it does not snow in Antioch?

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

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

In August, the average length of the day in Antioch, California, is 13.6h.

How long on average sun shines in August in Antioch?

In August, the average sunshine is 11.9h.

When is the highest UV index in Antioch?

Months with the highest UV index in Antioch, California, are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Antioch?

In August, the average daily maximum UV index in Antioch, California, is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.

Average temperature in August
Antioch, CA

Average temperature in August - Antioch, 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).

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Average pressure in August
Antioch, CA

Average pressure in August - Antioch, CA
  • Average pressure in August: 29.92"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in August
Antioch, CA

Average wind speed in August - Antioch, CA
  • Average wind speed in August: 7mph

The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

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Average humidity in August
Antioch, CA

Average humidity in August - Antioch, 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%).

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Average rainfall in August
Antioch, CA

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

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

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Average rainfall days in August
Antioch, CA

Average rainfall days in August - Antioch, 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 least rainy days is August (0.8 days).

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Average snowfall days in August
Antioch, CA

Average snowfall days in August - Antioch, 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 least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in August /
Average sunshine in August
Antioch, CA

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

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

  • Average sunshine in August: 11.9h

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

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Average sunshine days in August
Antioch, CA

Average sunshine days in August - Antioch, CA
  • Average sunshine days in August: 29.8 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.7 days).

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Average UV index in August
Antioch, CA

Average UV index in August - Antioch, 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).

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Average cloud cover in August
Antioch, CA

Average cloud cover in August - Antioch, CA
  • Average cloud cover in August: 7

Months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in August
Antioch, CA

Average visibility in August - Antioch, CA
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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