August weather forecast
San Ramon, CA

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A street in San Ramon, California, featuring a stunning beauty of golden and brown trees on both sides of the road, during autumn
A street in San Ramon, California, featuring a stunning beauty of golden and brown trees on both sides of the road, during autumn

Weather in August

The last month of the summer, August, is another warm month in San Ramon, California, with an average temperature ranging between max 83.3°F (28.5°C) and min 55.9°F (13.3°C).

Temperature

San Ramon in August witnesses an average high-temperature of a still moderately hot 83.3°F (28.5°C), indicating a slight variation from July's 83.7°F (28.7°C). San Ramon anticipates a stark contrast in temperature during August nights, with an average low of 55.9°F (13.3°C).

Heat index

For August, the heat index is estimated at a hot 86°F (30°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
The heat index's values are generally associated with conditions in shade and light breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

In San Ramon, the average relative humidity in August is 61%.

Rainfall

Months with rainfall in San Ramon, California, are January through June, August through December. August is the first month it rains in San Ramon. Throughout August, in the average 0.6 rainfall days, it receives 0.04" (1mm) of precipitation. In San Ramon, during the entire year, the rain falls for 67.2 days and collects up to 10.98" (279mm) of precipitation.

Daylight

In San Ramon, the average length of the day in August is 13h and 34min.
On the first day of the month, sunrise is at 6:12 am and sunset at 8:16 pm. On the last day of August, sunrise is at 6:37 am and sunset at 7:38 pm PDT.

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. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in August transforms into the following instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Frequently asked questions

How hot is it in San Ramon in August?

In August, the average high-temperature and low-temperature in San Ramon, California, are 83.3°F (28.5°C) and 55.9°F (13.3°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 86°F (30°C).

What is the average humidity in August in San Ramon?

In August, the average relative humidity is 61%.

When does it start to rain in San Ramon?

August is the first month it rains in San Ramon. Throughout August, in the average 0.6 rainfall days, it receives 0.04" (1mm) of precipitation.

How many hours of daylight does San Ramon have in August?

The average day length in August in San Ramon is 13h and 34min.

When is the sunrise / sunset in August in San Ramon?

On the first day of August in San Ramon, California, sunrise is at 6:12 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:38 pm PDT.

How long on average sun shines in August in San Ramon?

In August, the average sunshine duration in San Ramon, California, is 11.9h.

What are the months with the highest UV index in San Ramon?

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

What is the UV index intensity in August in San Ramon?

In August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
San Ramon, CA

Average temperature in August - San Ramon, CA
  • Average high temperature in August: 83.3°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in August: 55.9°F

The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (42.1°F).

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Average pressure in August
San Ramon, CA

Average pressure in August - San Ramon, 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
San Ramon, CA

Average wind speed in August - San Ramon, CA
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is May (6.7mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

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Average humidity in August
San Ramon, CA

Average humidity in August - San Ramon, CA
  • Average humidity in August: 61%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).

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Average rainfall in August
San Ramon, CA

Average rainfall in August - San Ramon, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0").

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Average rainfall days in August
San Ramon, CA

Average rainfall days in August - San Ramon, CA
  • Average rainfall days in August: 0.6 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).

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Average daylight in August /
Average sunshine in August
San Ramon, CA

Average daylight in August / Average sunshine in August - San Ramon, 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: 11h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in August
San Ramon, CA

Average sunshine days in August - San Ramon, CA
  • Average sunshine days in August: 29.8 days

The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is March (17.5 days).

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Average UV index in August
San Ramon, CA

Average UV index in August - San Ramon, 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
San Ramon, CA

Average cloud cover in August - San Ramon, CA
  • Average cloud cover in August: 8

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in August
San Ramon, CA

Average visibility in August - San Ramon, 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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San Ramon, California, USA

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