August weather forecast and climate
Rancho Bernardo, CA

Weather in August

The last month of the summer, August, is also a moderately hot month in Rancho Bernardo, California, with average temperature fluctuating between 84.2°F (29°C) and 64.4°F (18°C).

Temperature

With an average high-temperature of 84.2°F (29°C) and an average low-temperature of 64.4°F (18°C), August is the warmest month.

Heat index

The average heat index is calculated to a hot 88.2°F (31.2°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like wind, pregnancy, metabolic differences, 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Rancho Bernardo is 61%.

Rainfall

In Rancho Bernardo, California, during 2.9 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. Throughout the year, in Rancho Bernardo, there are 54.7 rainfall days, and 8.15" (207mm) of precipitation is accumulated.

Daylight

The average length of the day in Rancho Bernardo is 13.3h.

Sunshine

In Rancho Bernardo, the average sunshine is 11.9h.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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.
[Resources]

FAQ

What is the warmest month in Rancho Bernardo?

August is the warmest month, with an average high-temperature of 84.2°F (29°C) and an average low-temperature of 64.4°F (18°C).

What is the temperature in August in Rancho Bernardo?

The average high-temperature, in August, is 84.2°F (29°C), while the average low-temperature is 64.4°F (18°C). The average heat index (a.k.a. 'feels like', 'real feel'), that combines relative humidity and air temperature, in August is appraised at 88.2°F (31.2°C).

What is the average humidity in August in Rancho Bernardo?

The average relative humidity in August in Rancho Bernardo is 61%.

How many days does it rain in August in Rancho Bernardo?

In August, in Rancho Bernardo, California, the rain falls for 2.9 days. Throughout August, 0.24" (6mm) of precipitation is accumulated.

How many hours of daylight does Rancho Bernardo have in August?

In Rancho Bernardo, California, the average length of the day in August is 13.3h.

How long on average sun shines in August in Rancho Bernardo?

In Rancho Bernardo, California, the average sunshine in August is 11.9h.

What is the month with the highest UV index in Rancho Bernardo?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Rancho Bernardo.

What is the UV index reading in August in Rancho Bernardo?

In Rancho Bernardo, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in August
Rancho Bernardo, CA

Average temperature in August - Rancho Bernardo, CA
  • Average high temperature in August: 84.2°F

The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (63.9°F).

  • Average low temperature in August: 64.4°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (47.1°F).

[Resources]

Average pressure in August
Rancho Bernardo, CA

Average pressure in August - Rancho Bernardo, CA
  • Average pressure in August: 29.88"

The month with the highest atmospheric pressure is January (30.09").
Months with the lowest atmospheric pressure are June and September (29.87").

[Resources]

Average wind speed in August
Rancho Bernardo, CA

Average wind speed in August - Rancho Bernardo, CA
  • Average wind speed in August: 4.4mph

The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.3mph).

[Resources]

Average humidity in August
Rancho Bernardo, CA

Average humidity in August - Rancho Bernardo, CA
  • Average humidity in August: 61%

The month with the highest relative humidity is May (68%).
The month with the lowest relative humidity is November (54%).

[Resources]

Average rainfall in August
Rancho Bernardo, CA

Average rainfall in August - Rancho Bernardo, CA
  • Average rainfall in August: 0.24"

The wettest month (with the highest rainfall) is February (1.61").
The driest month (with the least rainfall) is June (0.08").

[Resources]

Average rainfall days in August
Rancho Bernardo, CA

Average rainfall days in August - Rancho Bernardo, CA
  • Average rainfall days in August: 2.9 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (1.6 days).

[Resources]

Average daylight in August /
Average sunshine in August
Rancho Bernardo, CA

Average daylight in August / Average sunshine in August - Rancho Bernardo, CA
  • Average daylight in August: 13.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in August: 11.9h

The month with the most sunshine is July (Average sunshine: 12h).
Months with the least sunshine are January and December (Average sunshine: 6.7).

[Resources]

Average sunshine days in August
Rancho Bernardo, CA

Average sunshine days in August - Rancho Bernardo, CA
  • Average sunshine days in August: 26 days

The month with the most sunshine days is June (27 days).
The month with the least sunshine days is February (21.2 days).

[Resources]

Average UV index in August
Rancho Bernardo, CA

Average UV index in August - Rancho Bernardo, CA
  • Average UV index in August: 6

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

[Resources]

Average cloud cover in August
Rancho Bernardo, CA

Average cloud cover in August - Rancho Bernardo, CA
  • Average cloud cover in August: 7

The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).

[Resources]

Average visibility in August
Rancho Bernardo, CA

Average visibility in August - Rancho Bernardo, 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).

[Resources]