August weather forecast
South San Gabriel, CA

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Weather in August

The last month of the summer, August, is a hot month in South San Gabriel, California, with temperature in the range of an average high of 87.4°F (30.8°C) and an average low of 64.9°F (18.3°C).

Temperature

South San Gabriel's warmest month, August, generally records average temperatures ranging from a high of 87.4°F (30.8°C) to a low of 64.9°F (18.3°C).

Heat index

August's mean heat index is calculated to be a tropical 89.6°F (32°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

The average relative humidity in August in South San Gabriel is 51%.

Rainfall

In August, the rain falls for 1.8 days. Throughout August, 0.08" (2mm) of precipitation is accumulated. In South San Gabriel, California, during the entire year, the rain falls for 43 days and collects up to 6.06" (154mm) of precipitation.

Daylight

The average length of the day in August in South San Gabriel is 13h and 23min.
On the first day of August in South San Gabriel, sunrise is at 6:04 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:19 pm PDT.

Sunshine

In South San Gabriel, California, the average sunshine in August is 12h.

UV index

The months with the highest UV index in South San Gabriel, California, are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In August, an average UV index of 6 transforms into the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the hottest time of year in South San Gabriel?

The warmest period tends to be August, when average temperatures fluctuate between a high of 87.4°F (30.8°C) and a low of 64.9°F (18.3°C).

How hot is August in South San Gabriel?

August temperatures in South San Gabriel vary between a high-temperature of 87.4°F (30.8°C) and a low-temperature of 64.9°F (18.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is calculated to be 89.6°F (32°C).

What is the average humidity in August in South San Gabriel?

In August, the average relative humidity in South San Gabriel, California, is 51%.

How much does it rain in South San Gabriel in August?

In South San Gabriel, during August, the rain falls for 1.8 days and regularly aggregates up to 0.08" (2mm) of precipitation.

How many hours of daylight does South San Gabriel have in August?

The average day length in August in South San Gabriel is 13h and 23min.

When are sunrise and sunset in August in South San Gabriel?

On the first day of August in South San Gabriel, California, sunrise is at 6:04 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:19 pm PDT.

How long on average sun shines in August in South San Gabriel?

The average sunshine duration in August is 12h.

What is the month with the highest UV index in South San Gabriel?

June through September, with an average maximum UV index of 6, are months with the highest UV index in South San Gabriel, California.

How high is the UV index in August in South San Gabriel?

The average daily maximum UV index in August in South San Gabriel is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
South San Gabriel, CA

Average temperature in August - South San Gabriel, CA
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is December (63.5°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (47.5°F).

Average pressure in August
South San Gabriel, CA

Average pressure in August - South San Gabriel, CA
  • Average pressure in August: 29.89"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in August
South San Gabriel, CA

Average wind speed in August - South San Gabriel, CA
  • Average wind speed in August: 4.6mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.5mph).

Average humidity in August
South San Gabriel, CA

Average humidity in August - South San Gabriel, CA
  • Average humidity in August: 51%

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).

Average rainfall in August
South San Gabriel, CA

Average rainfall in August - South San Gabriel, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in August
South San Gabriel, CA

Average rainfall days in August - South San Gabriel, CA
  • Average rainfall days in August: 1.8 days

The month with the highest number of rainy days is March (5.5 days).
The month with the least rainy days is June (1.2 days).

Average daylight in August /
Average sunshine in August
South San Gabriel, CA

Average daylight in August / Average sunshine in August - South San Gabriel, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).

Average sunshine days in August
South San Gabriel, CA

Average sunshine days in August - South San Gabriel, CA
  • Average sunshine days in August: 27 days

The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (22.2 days).

Average UV index in August
South San Gabriel, CA

Average UV index in August - South San Gabriel, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).

Average cloud cover in August
South San Gabriel, CA

Average cloud cover in August - South San Gabriel, CA
  • Average cloud cover in August: 5

The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in August
South San Gabriel, CA

Average visibility in August - South San Gabriel, CA
  • Average visibility in August: 6mi

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

South San Gabriel, California, USA

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