August weather forecast and climate
Irvine, CA

The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape
The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape
August, the last month of the summer, in Irvine, is also a moderately hot month, with average temperature ranging between min 64.9°F (18.3°C) and max 79.9°F (26.6°C).

Temperature

August is the warmest month, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 64.9°F (18.3°C).

Humidity

In Irvine, the average relative humidity is 65%.

Rainfall

In Irvine, during 3.3 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Irvine, during the entire year, the rain falls for 63.7 days and collects up to 7.91" (201mm) of precipitation.

Daylight

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

Sunshine

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

UV index

Months with the highest UV index in Irvine are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the average person.
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the warmest month in Irvine?

The warmest month in Irvine is August, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 64.9°F (18.3°C).

What is the temperature in August in Irvine?

In Irvine, in August, the average high-temperature is 79.9°F (26.6°C), and the average low-temperature is 64.9°F (18.3°C).

What is the average humidity in August in Irvine?

In Irvine, California, the average relative humidity in August is 65%.

How many days does it rain in August in Irvine?

In Irvine, California, in August, during 3.3 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

What is the average length of the day in August in Irvine?

The average length of the day in August in Irvine, California, is 13.4h.

What is the month with the most sunshine in Irvine?

Months with the most sunshine in Irvine, California, are July and August, with an average of 12h of sunshine.

How long on average sun shines in August in Irvine?

The average sunshine in August is 12h.

What are the months with the highest UV index in Irvine?

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

How high is the UV index in August in Irvine?

In August, the average daily maximum UV index in Irvine is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in August - Irvine, CA
  • Average high temperature in August: 79.9°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).

Average pressure in August - Irvine, CA
  • Average pressure in August: 29.9"

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

Average wind speed in August - Irvine, CA
  • Average wind speed in August: 4.9mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

Average humidity in August - Irvine, CA
  • Average humidity in August: 65%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).

Average rainfall in August - Irvine, CA
  • Average rainfall in August: 0.35"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in August - Irvine, CA
  • Average rainfall days in August: 3.3 days

The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is June (2.2 days).

Average daylight in August / Average sunshine in August - Irvine, 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: 9.9h).

  • 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).

Average sunshine days in August - Irvine, CA
  • Average sunshine days in August: 23.9 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is May (19.7 days).

Average UV index in August - Irvine, 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).

Average cloud cover in August - Irvine, CA
  • Average cloud cover in August: 7

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

Average visibility in August - Irvine, 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).