August weather forecast and climate
San Antonio Heights, CA

Weather in August

The last month of the summer, August, is another hot month in San Antonio Heights, California, with temperature in the range of an average high of 91°F (32.8°C) and an average low of 65.8°F (18.8°C).

Temperature

With an average high-temperature of 91°F (32.8°C) and an average low-temperature of 65.8°F (18.8°C), August is the warmest month.

Heat index

In August, the average heat index is estimated at a hot 93°F (33.9°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', 'feels like', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, pregnancy, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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

August is the least humid month in San Antonio Heights, with an average relative humidity of 42%.

Rainfall

In August, the rain falls for 1.7 days. Throughout August, 0.12" (3mm) of precipitation is accumulated. In San Antonio Heights, during the entire year, the rain falls for 49.6 days and collects up to 7.8" (198mm) of precipitation.

Snowfall

January, March through December are months without snowfall in San Antonio Heights, California.

Daylight

In San Antonio Heights, the average length of the day is 13.4h.

Sunshine

In August, the average sunshine is 12h.

UV index

Months with the highest UV index in San Antonio Heights are July and August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the warmest month in San Antonio Heights?

August is the warmest month in San Antonio Heights, California, with an average high-temperature of 91°F (32.8°C) and an average low-temperature of 65.8°F (18.8°C).

What is the temperature in August in San Antonio Heights?

In San Antonio Heights, in August, the average high-temperature is 91°F (32.8°C), and the average low-temperature is 65.8°F (18.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, is evaluated at 93°F (33.9°C).

What is the least humid month in San Antonio Heights?

August is the least humid month in San Antonio Heights, California, with an average relative humidity of 42%.

What is the average humidity in August in San Antonio Heights?

The average relative humidity in August in San Antonio Heights, California, is 42%.

How many days does it rain in August in San Antonio Heights?

In San Antonio Heights, during August, the rain falls for 1.7 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in San Antonio Heights?

In San Antonio Heights, California, snow does not fall in January, March through December.

What is the average length of the day in August in San Antonio Heights?

In San Antonio Heights, the average length of the day in August is 13.4h.

How many hours of sunshine does San Antonio Heights have in August?

In August, the average sunshine in San Antonio Heights is 12h.

When is the highest UV index in San Antonio Heights?

Months with the highest UV index are July and August, with an average maximum UV index of 7.

How high is the UV index in August in San Antonio Heights?

The average daily maximum UV index in August in San Antonio Heights is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.

Average temperature in August
San Antonio Heights, CA

Average temperature in August - San Antonio Heights, CA
  • Average high temperature in August: 91°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).

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Average pressure in August
San Antonio Heights, CA

Average pressure in August - San Antonio Heights, CA
  • Average pressure in August: 29.88"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in August
San Antonio Heights, CA

Average wind speed in August - San Antonio Heights, CA
  • Average wind speed in August: 4.7mph

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in August
San Antonio Heights, CA

Average humidity in August - San Antonio Heights, CA
  • Average humidity in August: 42%

Months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in August
San Antonio Heights, CA

Average rainfall in August - San Antonio Heights, CA
  • Average rainfall in August: 0.12"

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in August
San Antonio Heights, CA

Average rainfall days in August - San Antonio Heights, CA
  • Average rainfall days in August: 1.7 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in August
San Antonio Heights, CA

Average snowfall days in August - San Antonio Heights, CA
  • Average snowfall days in August: 0 days

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

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Average daylight in August /
Average sunshine in August
San Antonio Heights, CA

Average daylight in August / Average sunshine in August - San Antonio Heights, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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Average sunshine days in August
San Antonio Heights, CA

Average sunshine days in August - San Antonio Heights, CA
  • Average sunshine days in August: 26.8 days

The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in August
San Antonio Heights, CA

Average UV index in August - San Antonio Heights, CA
  • Average UV index in August: 7

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
San Antonio Heights, CA

Average cloud cover in August - San Antonio Heights, CA
  • Average cloud cover in August: 5

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in August
San Antonio Heights, CA

Average visibility in August - San Antonio Heights, 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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