October 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
October, like September, in Irvine, California, is another warm autumn month, with average temperature fluctuating between 74.7°F (23.7°C) and 61.5°F (16.4°C).

Temperature

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

Humidity

In Irvine, the average relative humidity in October 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

In October, the average length of the day in Irvine is 11.3h.

Sunshine

In Irvine, the average sunshine is 8.5h.

UV index

In Irvine, California, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in October in Irvine?

In Irvine, California, in October, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 61.5°F (16.4°C).

What is the average humidity in October in Irvine?

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

How much does it rain in Irvine in October?

In October, in Irvine, 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?

In October, the average length of the day in Irvine is 11.3h.

How long on average sun shines in October in Irvine?

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

What is the UV index reading in October in Irvine?

In October, the average daily maximum UV index in Irvine is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.
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).

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").

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).

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%).

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").

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).

Average daylight in October / Average sunshine in October - Irvine, CA
  • Average daylight in October: 11.3h

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 October: 8.5h

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 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).

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

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 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).

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