January 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 January

January, like December, in Irvine, California, is another enjoyable winter month, with an average temperature fluctuating between 64.9°F (18.3°C) and 51.8°F (11°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still enjoyable 64.9°F (18.3°C). The average low-temperature, in January, is 51.8°F (11°C).

Humidity

In Irvine, the average relative humidity in January is 58%.

Rainfall

In Irvine, in January, it is raining for 5.4 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, in Irvine, California, there are 63.7 rainfall days, and 7.91" (201mm) of precipitation is accumulated.

Daylight

The average length of the day in January in Irvine is 10h and 13min.
On the first day of the month, sunrise is at 6:55 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:47 am and sunset at 5:21 pm PST.

Sunshine

The average sunshine in January in Irvine is 6.8h.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in January interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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.
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FAQ

What is the average humidity in January in Irvine?

The average relative humidity in January in Irvine, California, is 58%.

How much does it rain in Irvine in January?

In Irvine, in January, during 5.4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

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

In Irvine, the average day length in January is 10h and 13min.

When is the sunrise / sunset in January in Irvine?

On the first day of January, sunrise is at 6:55 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 5:21 pm PST.

How many hours of sunshine does Irvine have in January?

The average sunshine duration in January in Irvine, California, is 6.8h.

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

The months with the lowest UV index in Irvine, California, are January through March, November and December, with an average maximum UV index of 4.

How high is the UV index in January in Irvine?

The average daily maximum UV index in January is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Irvine, CA

Average temperature in January - Irvine, CA
  • Average high temperature in January: 64.9°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 January: 51.8°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 January
Irvine, CA

Average pressure in January - Irvine, CA
  • Average pressure in January: 30.1"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).

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Average wind speed in January
Irvine, CA

Average wind speed in January - Irvine, CA
  • Average wind speed in January: 5.2mph

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 January
Irvine, CA

Average humidity in January - Irvine, CA
  • Average humidity in January: 58%

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 January
Irvine, CA

Average rainfall in January - Irvine, CA
  • Average rainfall in January: 1.14"

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 January
Irvine, CA

Average rainfall days in January - Irvine, CA
  • Average rainfall days in January: 5.4 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 January /
Average sunshine in January
Irvine, CA

Average daylight in January / Average sunshine in January - Irvine, CA
  • Average daylight in January: 10h and 13min

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 January: 6h and 48min

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).

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Average sunshine days in January
Irvine, CA

Average sunshine days in January - Irvine, CA
  • Average sunshine days in January: 24.5 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 January
Irvine, CA

Average UV index in January - Irvine, CA
  • Average UV index in January: 4

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 January
Irvine, CA

Average cloud cover in January - Irvine, CA
  • Average cloud cover in January: 21

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 January
Irvine, CA

Average visibility in January - Irvine, CA
  • Average visibility in January: 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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