August weather forecast
Pleasanton, CA

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Neon-lit buildings in the CBD of downtown Pleasanton, California
Neon-lit buildings in the CBD of downtown Pleasanton, California

Weather in August

August, the last month of the summer in Pleasanton, is also a moderately hot month, with an average temperature ranging between min 56.7°F (13.7°C) and max 84.7°F (29.3°C).

Temperature

Pleasanton marks the onset of August with an average high-temperature of a still moderately hot 84.7°F (29.3°C), subtly divergent from July's 85.3°F (29.6°C). In Pleasanton, a significant divergence from daytime highs is recorded, with average lows of 56.7°F (13.7°C) during August nights.

Heat index

For most parts of August, the heat index is estimated at a hot 87.8°F (31°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity is 59%.

Rainfall

July and August are months with the least rain in Pleasanton when the rain falls for 0.9 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

The average length of the day in August is 13h and 34min.
On the first day of August, sunrise is at 6:12 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:37 pm PDT.

Sunshine

The average sunshine in August in Pleasanton is 12h.

UV index

The months with the highest UV index in Pleasanton are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

How hot is August in Pleasanton?

The high-temperature, in August, in Pleasanton, records 84.7°F (29.3°C), while the low-temperature is 56.7°F (13.7°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 87.8°F (31°C).

What is the average humidity in August in Pleasanton?

In Pleasanton, the average relative humidity in August is 59%.

What is the driest month in Pleasanton?

The months with the least rainfall in Pleasanton, California, are July and August Rain falls for 0.9 days and accumulates 0.04" (1mm) of rain.

How much does it rain in Pleasanton in August?

In Pleasanton, California, in August, it is raining for 0.9 days, with typically 0.04" (1mm) of accumulated precipitation.

How many hours of daylight does Pleasanton have in August?

In Pleasanton, California, the average day length in August is 13h and 34min.

When are sunrise and sunset in August in Pleasanton?

On the first day of August in Pleasanton, California, sunrise is at 6:12 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:37 pm PDT.

How many hours of sunshine does Pleasanton have in August?

In August, the average sunshine duration in Pleasanton is 12h.

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

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 Pleasanton?

The average daily maximum UV index in August in Pleasanton is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Pleasanton, CA

Average temperature in August - Pleasanton, CA
  • Average high temperature in August: 84.7°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in August: 56.7°F

The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in August
Pleasanton, CA

Average pressure in August - Pleasanton, CA
  • Average pressure in August: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in August
Pleasanton, CA

Average wind speed in August - Pleasanton, CA
  • Average wind speed in August: 5.3mph

The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

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Average humidity in August
Pleasanton, CA

Average humidity in August - Pleasanton, CA
  • Average humidity in August: 59%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (56%).

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Average rainfall in August
Pleasanton, CA

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

The wettest month (with the highest rainfall) is February (2.05").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in August
Pleasanton, CA

Average rainfall days in August - Pleasanton, CA
  • Average rainfall days in August: 0.9 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).

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

Average daylight in August / Average sunshine in August - Pleasanton, CA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in August
Pleasanton, CA

Average sunshine days in August - Pleasanton, CA
  • Average sunshine days in August: 29 days

The month with the most sunshine days is August (29 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index in August
Pleasanton, CA

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

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

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Average cloud cover in August
Pleasanton, CA

Average cloud cover in August - Pleasanton, CA
  • Average cloud cover in August: 6

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

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Average visibility in August
Pleasanton, CA

Average visibility in August - Pleasanton, 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).

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Pleasanton, California, USA

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