August weather forecast
Opal Cliffs, CA

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Weather in August

August, the last month of the summer in Opal Cliffs, is another pleasant month, with an average temperature ranging between max 73°F (22.8°C) and min 54.7°F (12.6°C).

Temperature

August and September represent the warmest period, with an average high-temperature of 73°F (22.8°C).

Humidity

The average relative humidity in August is 74%.

Rainfall

The months with the least rainfall are July and August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

Ocean temperature

August and September, with an average ocean temperature of 58.1°F (14.5°C), are months with the warmest seawater.
Note: It is risky to swim in 58.1°F (14.5°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.

Daylight

In August, the average length of the day is 13h and 32min.
On the first day of August, sunrise is at 6:13 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:37 pm PDT.

Sunshine

In Opal Cliffs, California, the average sunshine in August is 11.6h.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 5 in August interprets into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest?

Opal Cliffs sees the average highest temperatures during the months of August and September, peaking at 73°F (22.8°C).

What is the temperature in August?

The high-temperature, in August, in Opal Cliffs, is 73°F (22.8°C), while the low-temperature averages to 54.7°F (12.6°C).

What is the average humidity in August?

In August, the average relative humidity is 74%.

What is the driest month?

The months with the least rainfall in Opal Cliffs are July and August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

How much does it rain in Opal Cliffs in August?

In Opal Cliffs, in August, during 1.2 rainfall days, 0.04" (1mm) of precipitation is typically accumulated.

When is the ocean warmest?

The months with the warmest seawater are August and September, with an average ocean temperature of 58.1°F (14.5°C).

What is the ocean temperature in August?

In Opal Cliffs, in August, the average water temperature is 58.1°F (14.5°C). Swimming in 58.1°F (14.5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in August?

In August, the average day length in Opal Cliffs is 13h and 32min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:13 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:37 pm PDT.

How long on average sun shines in August?

In August, the average sunshine duration is 11.6h.

What are the months with the highest UV index?

June through September, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index reading in August?

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Opal Cliffs, CA

Average temperature in August - Opal Cliffs, CA
  • Average high temperature in August: 73°F

The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in August: 54.7°F

The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).

Average pressure in August
Opal Cliffs, CA

Average pressure in August - Opal Cliffs, CA
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

Average wind speed in August
Opal Cliffs, CA

Average wind speed in August - Opal Cliffs, CA
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in August
Opal Cliffs, CA

Average humidity in August - Opal Cliffs, CA
  • Average humidity in August: 74%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).

Average rainfall in August
Opal Cliffs, CA

Average rainfall in August - Opal Cliffs, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in August
Opal Cliffs, CA

Average rainfall days in August - Opal Cliffs, CA
  • Average rainfall days in August: 1.2 days

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).

Average sea temperature in August
Opal Cliffs, CA

Average sea temperature in August - Opal Cliffs, CA
  • Average sea temperature in August: 58.1°F

The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

Average daylight in August /
Average sunshine in August
Opal Cliffs, CA

Average daylight in August / Average sunshine in August - Opal Cliffs, CA
  • Average daylight in August: 13h and 3min

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 42min).

  • Average sunshine in August: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in August
Opal Cliffs, CA

Average sunshine days in August - Opal Cliffs, CA
  • Average sunshine days in August: 27.8 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).

Average UV index in August
Opal Cliffs, CA

Average UV index in August - Opal Cliffs, CA
  • Average UV index in August: 5

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and November (UV index 3).

Average cloud cover in August
Opal Cliffs, CA

Average cloud cover in August - Opal Cliffs, CA
  • Average cloud cover in August: 17

The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 15).

Average visibility in August
Opal Cliffs, CA

Average visibility in August - Opal Cliffs, 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).

Opal Cliffs, California, USA

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