August weather forecast and climate
Mission Viejo, CA

The calm waters on Lake Mission Viejo, California,
The calm waters on Lake Mission Viejo, California,

Weather in August

August, the last month of the summer, in Mission Viejo, is also a moderately hot month, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 64°F (17.8°C).

Temperature

With an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64°F (17.8°C), August is the warmest month.

Heat index

The average heat index is appraised at 83.3°F (28.5°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like clothing, wind, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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

In Mission Viejo, the average relative humidity is 64%.

Rainfall

In Mission Viejo, in August, it is raining for 3.1 days, with typically 0.35" (9mm) of accumulated precipitation. In Mission Viejo, during the entire year, the rain falls for 64.1 days and collects up to 5.67" (144mm) of precipitation.

Daylight

In Mission Viejo, California, the average length of the day is 13.4h.

Sunshine

July and August, with an average of 12h of sunshine, are months with the most sunshine in Mission Viejo.

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 threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 in August transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Mission Viejo?

The warmest month in Mission Viejo, California, is August, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64°F (17.8°C).

What is the temperature in August in Mission Viejo?

In Mission Viejo, in August, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 64°F (17.8°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), that combines relative humidity and air temperature, is appraised at 83.3°F (28.5°C).

What is the average humidity in August in Mission Viejo?

In Mission Viejo, California, the average relative humidity in August is 64%.

How much does it rain in Mission Viejo in August?

In Mission Viejo, in August, during 3.1 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

What is the average length of the day in August in Mission Viejo?

In August, the average length of the day is 13.4h.

What are the months with the most sunshine in Mission Viejo?

July and August, with an average of 12h of sunshine, are months with the most sunshine in Mission Viejo, California.

How many hours of sunshine does Mission Viejo have in August?

In August, the average sunshine in Mission Viejo is 12h.

What are the months with the highest UV index in Mission Viejo?

Months with the highest UV index in Mission Viejo, California, are June through September, with an average maximum UV index of 6.

How high is the UV index in August in Mission Viejo?

In August, the average daily maximum UV index in Mission Viejo is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.

Average temperature in August
Mission Viejo, CA

Average temperature in August - Mission Viejo, CA
  • Average high temperature in August: 80.8°F

The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in August: 64°F

The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in August
Mission Viejo, CA

Average pressure in August - Mission Viejo, CA
  • Average pressure in August: 29.89"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed in August
Mission Viejo, CA

Average wind speed in August - Mission Viejo, CA
  • Average wind speed in August: 4.5mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in August
Mission Viejo, CA

Average humidity in August - Mission Viejo, CA
  • Average humidity in August: 64%

Months with the highest relative humidity are May and June (70%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in August
Mission Viejo, CA

Average rainfall in August - Mission Viejo, CA
  • Average rainfall in August: 0.35"

The wettest month (with the highest rainfall) is December (0.98").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in August
Mission Viejo, CA

Average rainfall days in August - Mission Viejo, CA
  • Average rainfall days in August: 3.1 days

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.3 days).

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Average daylight in August /
Average sunshine in August
Mission Viejo, CA

Average daylight in August / Average sunshine in August - Mission Viejo, 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: 10h).

  • Average sunshine in August: 12h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in August
Mission Viejo, CA

Average sunshine days in August - Mission Viejo, CA
  • Average sunshine days in August: 24.4 days

Months with the most sunshine days are January and August (24.4 days).
The month with the least sunshine days is May (19.5 days).

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Average UV index in August
Mission Viejo, CA

Average UV index in August - Mission Viejo, 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, March, November and December (UV index 4).

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Average cloud cover in August
Mission Viejo, CA

Average cloud cover in August - Mission Viejo, CA
  • Average cloud cover in August: 7

Months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in August
Mission Viejo, CA

Average visibility in August - Mission Viejo, 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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