October weather forecast
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

Weather in October

October, like September, in Irvine, California, is a moderately hot autumn month, with an average temperature varying between 74.7°F (23.7°C) and 61.5°F (16.4°C).

Temperature

In October, the average high-temperature is practically the same as in September - a still moderately hot 74.7°F (23.7°C). In October, in Irvine, California, the average low-temperature is 61.5°F (16.4°C).

Humidity

In October, the average relative humidity is 61%.

Rainfall

In Irvine, in October, during 5.1 rainfall days, 0.39" (10mm) 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

The average length of the day in October is 11h and 20min.
On the first day of October, sunrise is at 6:45 am and sunset at 6:35 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:59 pm PDT.

Sunshine

The average sunshine in October is 8.5h.

UV index

In Irvine, the average daily maximum UV index in October is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In October, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in October in Irvine?

In Irvine, California, the average relative humidity in October is 61%.

How much does it rain in Irvine in October?

In October, the rain falls for 5.1 days. Throughout October, 0.39" (10mm) of precipitation is accumulated.

How many hours of daylight does Irvine have in October?

The average day length in October in Irvine is 11h and 20min.

What time are sunrise and sunset in October in Irvine?

On the first day of October in Irvine, sunrise is at 6:45 am and sunset at 6:35 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:59 pm PDT.

How long on average sun shines in October in Irvine?

In Irvine, California, the average sunshine duration in October is 8.5h.

What is the UV index intensity in October in Irvine?

In Irvine, the average daily maximum UV index in October is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Average temperature in October
Irvine, CA

Average temperature in October - Irvine, CA
  • Average high temperature in October: 74.7°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 October: 61.5°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).

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Average pressure in October
Irvine, CA

Average pressure in October - Irvine, CA
  • Average pressure in October: 29.94"

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

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Average wind speed in October
Irvine, CA

Average wind speed in October - Irvine, CA
  • Average wind speed in October: 4.8mph

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).

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Average humidity in October
Irvine, CA

Average humidity in October - Irvine, CA
  • Average humidity in October: 61%

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

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Average rainfall in October
Irvine, CA

Average rainfall in October - Irvine, CA
  • Average rainfall in October: 0.39"

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

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Average rainfall days in October
Irvine, CA

Average rainfall days in October - Irvine, CA
  • Average rainfall days in October: 5.1 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).

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Average daylight in October /
Average sunshine in October
Irvine, CA

Average daylight in October / Average sunshine in October - Irvine, CA
  • Average daylight in October: 11h and 20min

The month with the longest days is June (Average daylight: 14h and 22min).
The month with the shortest days is December (Average daylight: 9h and 58min).

  • Average sunshine in October: 8.5h

The 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 October
Irvine, CA

Average sunshine days in October - Irvine, CA
  • Average sunshine days in October: 23.3 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).

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Average UV index in October
Irvine, CA

Average UV index in October - Irvine, CA
  • Average UV index in October: 5

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).

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Average cloud cover in October
Irvine, CA

Average cloud cover in October - Irvine, CA
  • Average cloud cover in October: 14

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

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Average visibility in October
Irvine, CA

Average visibility in October - Irvine, CA
  • Average visibility in October: 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).

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