August weather forecast
Irvine, CA

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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

Weather in August

August in Irvine is characterized by high temperatures, similar to its predecessor in July. However, the shift towards the end of summer starts taking place towards the latter half of the month. The rainfall figure of 0.35" (9mm) indicates the pacifying heat while keeping it an excellent month for outdoor fun. The city dwellers often flock towards the beach to enjoy the serenity. August is unarguably a fantastic time to bask in the beauty of Irvine’s coastal vibes.

Temperature

In Irvine, the average temperatures in August are the highest, with a peak at 79.9°F (26.6°C) and a low of 64.9°F (18.3°C).

Humidity

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

Rainfall

In Irvine, in August, 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 is 13h and 22min.
On the first day of the month, sunrise is at 6:03 am and sunset at 7:51 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:17 pm PDT.

Sunshine

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

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 6. 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: A typical high UV index of 6 in August suggests the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. 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. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest in Irvine?

August registers as the month with the average highest temperatures, reaching 79.9°F (26.6°C) at its peak and 64.9°F (18.3°C) at the lowest.

What are the temperatures in August?

In August, in Irvine, 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?

The average relative humidity in August in Irvine is 65%.

How much does it rain in August?

In Irvine, in August, it is raining for 3.3 days, with typically 0.35" (9mm) of accumulated precipitation.

What is the average length of the day in August?

The average day length in August is 13h and 22min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 6:03 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:17 pm PDT.

What are the months with the most sunshine?

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

How long on average sun shines in August?

The average sunshine duration in August is 12h.

When is the highest UV index?

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

How high is the UV index in August?

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

Average temperature in August
Irvine, CA

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

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

Average wind speed in August
Irvine, CA

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 - 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 - 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 - 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 / Average sunshine in August - Irvine, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in August: 12h and 0min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in August
Irvine, CA

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 - Irvine, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The 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 - 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 - Irvine, 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).

Irvine, California, USA

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